Using the Language of Algebra
Use Variables and Algebraic Symbols
In the following exercises, translate from algebraic notation to words.
- 16−916−9
Show Solution
- 25−725−7
- 5⋅65⋅6
Show Solution
- 3⋅93⋅9
- 28÷428÷4
Show Solution
- 45÷545÷5
- x+8x+8
Show Solution
- x+11x+11
- (2)(7)(2)(7)
Show Solution
- (4)(8)(4)(8)
- 14<2114<21
Show Solution
- 17<3517<35
- 36≥1936≥19
Show Solution
- 42≥2742≥27
- 3n=243n=24
Show Solution
- 6n=366n=36
- y−1>6y−1>6
Show Solution
- y−4>8y−4>8
- 2≤18÷62≤18÷6
Show Solution
- 3≤20÷43≤20÷4
- a≠7⋅4a≠7⋅4
Show Solution
- a≠1⋅12a≠1⋅12
Identify Expressions and Equations
In the following exercises, determine if each is an expression or an equation.
- 9⋅6=549⋅6=54
Show Solution
- 7⋅9=637⋅9=63
- 5⋅4+35⋅4+3
Show Solution
- 6⋅3+56⋅3+5
- x+7x+7
Show Solution
- x+9x+9
- y−5=25y−5=25
Show Solution
- y−8=32y−8=32
Simplify Expressions with Exponents
In the following exercises, write in exponential form.
- 3⋅3⋅3⋅3⋅3⋅3⋅33⋅3⋅3⋅3⋅3⋅3⋅3
Show Solution
- 4⋅4⋅4⋅4⋅4⋅44⋅4⋅4⋅4⋅4⋅4
- x⋅x⋅x⋅x⋅xx⋅x⋅x⋅x⋅x
Show Solution
- y⋅y⋅y⋅y⋅y⋅yy⋅y⋅y⋅y⋅y⋅y
Simplify Expressions with Exponents
In the following exercises, write in expanded form.
- 5353
Show Solution
- 8383
- 2828
Show Solution
- 105105
Simplify Expressions Using the Order of Operations
In the following exercises, simplify.
- 3+8⋅53+8⋅5
Show Solution
- (3+8)⋅5(3+8)⋅5
Show Solution
- 2+6⋅32+6⋅3
- (2+6)⋅3(2+6)⋅3
- 23−12÷(9−5)23−12÷(9−5)
Show Solution
- 32−18÷(11−5)32−18÷(11−5)
- 3⋅8+5⋅23⋅8+5⋅2
Show Solution
- 4⋅7+3⋅54⋅7+3⋅5
- 2+8(6+1)2+8(6+1)
Show Solution
- 4+6(3+6)4+6(3+6)
- 4⋅12/84⋅12/8
Show Solution
- 2⋅36/62⋅36/6
- 6+10/2+26+10/2+2
Show Solution
- 9+12/3+49+12/3+4
- (6+10)÷(2+2)(6+10)÷(2+2)
Show Solution
- (9+12)÷(3+4)(9+12)÷(3+4)
- 20÷4+6⋅520÷4+6⋅5
Show Solution
- 33÷3+8⋅233÷3+8⋅2
- 20÷(4+6)⋅520÷(4+6)⋅5
Show Solution
- 33÷(3+8)⋅233÷(3+8)⋅2
- 42+5242+52
Show Solution
- 32+7232+72
- (4+5)2(4+5)2
Show Solution
- (3+7)2(3+7)2
- 3(1+9⋅6)−423(1+9⋅6)−42
Show Solution
- 5(2+8⋅4)−725(2+8⋅4)−72
- 2[1+3(10−2)]2[1+3(10−2)]
Show Solution
- 5[2+4(3−2)]5[2+4(3−2)]
Everyday Math
Basketball
In the 2014 NBA playoffs, the San Antonio Spurs beat the Miami Heat. The table below shows the heights of the starters on each team. Use this table to fill in the appropriate symbol (=,<,>)(=,<,>).
Spurs | Height | Heat | Height | |
---|---|---|---|---|
Tim Duncan | 83″ | Rashard Lewis | 82″ | |
Boris Diaw | 80″ | LeBron James | 80″ | |
Kawhi Leonard | 79″ | Chris Bosh | 83″ | |
Tony Parker | 74″ | Dwyane Wade | 76″ | |
Danny Green | 78″ | Ray Allen | 77″ |
- Height of Tim Duncan____Height of Rashard Lewis
- Height of Boris Diaw____Height of LeBron James
- Height of Kawhi Leonard____Height of Chris Bosh
- Height of Tony Parker____Height of Dwyane Wade
- Height of Danny Green____Height of Ray Allen
Elevation
In Colorado there are more than 5050 mountains with an elevation of over 14,000 feet.14,000 feet. The table shows the ten tallest. Use this table to fill in the appropriate inequality symbol.
Mountain | Elevation |
---|---|
Mt. Elbert | 14,433′ |
Mt. Massive | 14,421′ |
Mt. Harvard | 14,420′ |
Blanca Peak | 14,345′ |
La Plata Peak | 14,336′ |
Uncompahgre Peak | 14,309′ |
Crestone Peak | 14,294′ |
Mt. Lincoln | 14,286′ |
Grays Peak | 14,270′ |
Mt. Antero | 14,269′ |
Elevation of La Plata Peak____Elevation of Mt. Antero
Elevation of Blanca Peak____Elevation of Mt. Elbert
Elevation of Gray’s Peak____Elevation of Mt. Lincoln
Elevation of Mt. Massive____Elevation of Crestone Peak
Elevation of Mt. Harvard____Elevation of Uncompahgre Peak
Writing Exercises
Explain the difference between an expression and an equation.
Why is it important to use the order of operations to simplify an expression?
Evaluating, Simplifying, and Translating Algebraic Expressions
Evaluate Algebraic Expressions
In the following exercises, evaluate the expression for the given value.
- 7x+8 when x=27x+8 when x=2
Show Solution
- 9x+7 when x=39x+7 when x=3
- 5x−4 when x=65x−4 when x=6
Show Solution
- 8x−6 when x=78x−6 when x=7
- x2 when x=12x2 when x=12
Show Solution
- x3 when x=5x3 when x=5
- x5 when x=2x5 when x=2
Show Solution
- x4 when x=3x4 when x=3
- 3x when x=33x when x=3
Show Solution
- 4x when x=24x when x=2
- x2+3x−7 when x=4x2+3x−7 when x=4
Show Solution
- x2+5x−8 when x=6x2+5x−8 when x=6
- 2x+4y−5 when x=7,y=82x+4y−5 when x=7,y=8
Show Solution
- 6x+3y−9 when x=6,y=96x+3y−9 when x=6,y=9
- (x−y)2 when x=10,y=7(x−y)2 when x=10,y=7
Show Solution
- (x+y)2 when x=6,y=9(x+y)2 when x=6,y=9
Show Solution
- a2+b2 when a=3,b=8a2+b2 when a=3,b=8
Show Solution
- r2−s2 when r=12,s=5r2−s2 when r=12,s=5
- 2l+2w when l=15,w=122l+2w when l=15,w=12
Show Solution
- 2l+2w when l=18,w=142l+2w when l=18,w=14
Identify Terms, Coefficients, and Like Terms
In the following exercises, list the terms in the given expression.
- 15x2+6x+215x2+6x+2
Show Solution
- 11x2+8x+511x2+8x+5
- 10y3+y+210y3+y+2
Show Solution
- 9y3+y+59y3+y+5
In the following exercises, identify the coefficient of the given term.
- 8a8a
Show Solution
- 13m13m
- 5r25r2
Show Solution
- 6x36x3
In the following exercises, identify all sets of like terms.
- x3,8x,14,8y,5,8x3x3,8x,14,8y,5,8x3
Show Solution
- 6z,3w2,1,6z2,4z,w26z,3w2,1,6z2,4z,w2
- 9a,a2,16ab,16b2,4ab,9b29a,a2,16ab,16b2,4ab,9b2
Show Solution
- 3,25r2,10s,10r,4r2,3s3,25r2,10s,10r,4r2,3s
Simplify Expressions by Combining Like Terms
In the following exercises, simplify the given expression by combining like terms.
- 10x+3x10x+3x
Show Solution
- 15x+4x15x+4x
- 17a+9a17a+9a
Show Solution
- 18z+9z18z+9z
- 4c+2c+c4c+2c+c
Show Solution
- 6y+4y+y6y+4y+y
- 9x+3x+89x+3x+8
Show Solution
- 8a+5a+98a+5a+9
- 7u+2+3u+17u+2+3u+1
Show Solution
- 8d+6+2d+58d+6+2d+5
- 7p+6+5p+47p+6+5p+4
Show Solution
- 8x+7+4x−58x+7+4x−5
- 10a+7+5a−2+7a−410a+7+5a−2+7a−4
Show Solution
- 7c+4+6c−3+9c−17c+4+6c−3+9c−1
- 3x2+12x+11+14x2+8x+53x2+12x+11+14x2+8x+5
Show Solution
- 5b2+9b+10+2b2+3b−45b2+9b+10+2b2+3b−4
Translate English Phrases into Algebraic Expressions
In the following exercises, translate the given word phrase into an algebraic expression.
- The sum of 8 and 12
Show Solution
- The sum of 9 and 1
- The difference of 14 and 9
Show Solution
- 8 less than 19
- The product of 9 and 7
Show Solution
- The product of 8 and 7
- The quotient of 36 and 9
Show Solution
- The quotient of 42 and 7
- The difference of xx and 44
Show Solution
- 33 less than xx
- The product of 66 and yy
Show Solution
- The product of 99 and yy
- The sum of 8x8x and 3x3x
Show Solution
- The sum of 13x13x and 3x3x
- The quotient of yy and 33
Show Solution
- The quotient of yy and 88
- Eight times the difference of yy and nine
Show Solution
- Seven times the difference of yy and one
- Five times the sum of xx and yy
Show Solution
- Nine times five less than twice xx
Translate English Phrases into Algebraic Expressions
In the following exercises, write an algebraic expression.
- Adele bought a skirt and a blouse. The skirt cost $15$15 more than the blouse. Let bb represent the cost of the blouse. Write an expression for the cost of the skirt.
Show Solution
- Eric has rock and classical CDs in his car. The number of rock CDs is 33 more than the number of classical CDs. Let cc represent the number of classical CDs. Write an expression for the number of rock CDs.
- The number of girls in a second-grade class is 44 less than the number of boys. Let bb represent the number of boys. Write an expression for the number of girls.
Show Solution
- Marcella has 66 fewer male cousins than female cousins. Let ff represent the number of female cousins. Write an expression for the number of boy cousins.
- Greg has nickels and pennies in his pocket. The number of pennies is seven less than twice the number of nickels. Let nn represent the number of nickels. Write an expression for the number of pennies.
Show Solution
- Jeannette has $5$5 and $10$10 bills in her wallet. The number of fives is three more than six times the number of tens. Let tt represent the number of tens. Write an expression for the number of fives.
Everyday Math
In the following exercises, use algebraic expressions to solve the problem.
Car insurance
Justin’s car insurance has a $750$750 deductible per incident. This means that he pays $750$750 and his insurance company will pay all costs beyond $750$750. If Justin files a claim for $2,100$2,100, how much will he pay, and how much will his insurance company pay?
Home insurance
Pam and Armando’s home insurance has a $2,500$2,500 deductible per incident. This means that they pay $2,500$2,500 and their insurance company will pay all costs beyond $2,500$2,500. If Pam and Armando file a claim for $19,400$19,400, how much will they pay, and how much will their insurance company pay?
Writing Exercises
Explain why “the sum of x and y” is the same as “the sum of y and x,” but “the difference of x and y” is not the same as “the difference of y and x.” Try substituting two random numbers for xx and yy to help you explain.
Explain the difference between “44 times the sum of xx and yy” and “the sum of 44 times xx and yy.”
Subtraction Property of Equality
Determine Whether a Number is a Solution of an Equation
In the following exercises, determine whether each given value is a solution to the equation.
Exercise 1
x+13=21x+13=21
- x=8x=8
Show Solution
- x=34x=34
Show Solution
Exercise 2
y+18=25y+18=25
- y=7y=7
- y=43y=43
Exercise 3
m−4=13m−4=13
- m=9m=9
Show Solution
- m=17m=17
Show Solution
Exercise 4
n−9=6n−9=6
- n=3n=3
- n=15n=15
Exercise 5
3p+6=153p+6=15
- p=3p=3
Show Solution
- p=7p=7
Show Solution
Exercise 6
8q+4=208q+4=20
- q=2q=2
- q=3q=3
Exercise 7
18d−9=2718d−9=27
- d=1d=1
Show Solution
- d=2d=2
Show Solution
Exercise 8
24f−12=6024f−12=60
- f=2f=2
- f=3f=3
Exercise 9
8u−4=4u+408u−4=4u+40
- u=3u=3
Show Solution
- u=11u=11
Show Solution
Exercise 10
7v−3=4v+367v−3=4v+36
- v=3v=3
- v=11v=11
Exercise 11
20h−5=15h+3520h−5=15h+35
- h=6h=6
Show Solution
- h=8h=8
Show Solution
Exercise 12
18k−3=12k+3318k−3=12k+33
- k=1k=1
- k=6k=6
Model the Subtraction Property of Equality
In the following exercises, write the equation modeled by the envelopes and counters and then solve using the subtraction property of equality.
Exercise 1
Exercise 2
Exercise 3
Exercise 4
Solve Equations using the Subtraction Property of Equality
In the following exercises, solve each equation using the subtraction property of equality.
- a+2=18a+2=18
Show Solution
- b+5=13b+5=13
- p+18=23p+18=23
Show Solution
- q+14=31q+14=31
- r+76=100r+76=100
Show Solution
- s+62=95s+62=95
- 16=x+916=x+9
Show Solution
- 17=y+617=y+6
- 93=p+2493=p+24
Show Solution
- 116=q+79116=q+79
- 465=d+398465=d+398
Show Solution
- 932=c+641932=c+641
Solve Equations using the Addition Property of Equality
In the following exercises, solve each equation using the addition property of equality.
- y−3=19y−3=19
Show Solution
- x−4=12x−4=12
- u−6=24u−6=24
Show Solution
- v−7=35v−7=35
- f−55=123f−55=123
Show Solution
- g−39=117g−39=117
- 19=n−1319=n−13
Show Solution
- 18=m−1518=m−15
- 10=p−3810=p−38
Show Solution
- 18=q−7218=q−72
- 268=y−199268=y−199
Show Solution
- 204=z−149204=z−149
Translate Word Phrase to Algebraic Equations
In the following exercises, translate the given sentence into an algebraic equation.
- The sum of 88 and 99 is equal to 1717.
Show Solution
- The sum of 77 and 99 is equal to 1616.
- The difference of 2323 and 1919 is equal to 44.
Show Solution
- The difference of 2929 and 1212 is equal to 1717.
- The product of 33 and 99 is equal to 2727.
Show Solution
- The product of 66 and 88 is equal to 4848.
- The quotient of 5454 and 66 is equal to 99.
Show Solution
- The quotient of 4242 and 77 is equal to 66.
- Twice the difference of nn and 1010 gives 5252.
Show Solution
- Twice the difference of mm and 1414 gives 6464.
- The sum of three times yy and 1010 is 100100.
Show Solution
- The sum of eight times xx and 44 is 6868.
Translate to an Equation and Solve
In the following exercises, translate the given sentence into an algebraic equation and then solve it.
- Five more than pp is equal to 2121.
Show Solution
- Nine more than qq is equal to 4040.
- The sum of rr and 1818 is 7373.
Show Solution
- The sum of ss and 1313 is 6868.
- The difference of dd and 3030 is equal to 5252.
Show Solution
- The difference of cc and 2525 is equal to 7575.
- 1212 less than uu is 8989.
Show Solution
- 1919 less than ww is 5656.
- 325325 less than cc gives 799799.
Show Solution
- 299299 less than dd gives 850.
Everyday Math
Insurance
Vince’s car insurance has a $500 deductible. Find the amount the insurance company will pay, p, for an $1800 claim by solving the equation 500+p=1800.
Insurance
Marta’s homeowner’s insurance policy has a $750 deductible. The insurance company paid $5800 to repair damages caused by a storm. Find the total cost of the storm damage, d, by solving the equation d−750=5800.
Sale purchase
Arthur bought a suit that was on sale for $120 off. He paid $340 for the suit. Find the original price, p, of the suit by solving the equation p−120=340.
Sale purchase
Rita bought a sofa that was on sale for $1299. She paid a total of $1409, including sales tax. Find the amount of the sales tax, t, by solving the equation 1299+t=1409.
Writing Exercises
Is x=1 a solution to the equation 8x−2=16−6x? How do you know?
Write the equation y−5=21 in words. Then make up a word problem for this equation.
Finding Multiples and Factors
Identify Multiples of Numbers
In the following exercises, list all the multiples less than 50 for the given number.
- 2
Show Solution
- 3
- 4
Show Solution
- 5
- 6
Show Solution
- 7
- 8
Show Solution
- 9
- 10
Show Solution
- 12
Use Common Divisibility Tests
In the following exercises, use the divisibility tests to determine whether each number is divisible by 2,3,4,5,6,and10.
- 84
Show Solution
- 96
- 75
Show Solution
- 78
- 168
Show Solution
- 264
- 900
Show Solution
- 800
- 896
Show Solution
- 942
- 375
Show Solution
- 750
- 350
Show Solution
- 550
- 1430
Show Solution
- 1080
- 22,335
Show Solution
- 39,075
Find All the Factors of a Number
In the following exercises, find all the factors of the given number.
- 36
Show Solution
- 42
- 60
Show Solution
- 48
- 144
Show Solution
- 200
- 588
Show Solution
- 576
Identify Prime and Composite Numbers
In the following exercises, determine if the given number is prime or composite.
- 43
Show Solution
- 67
- 39
Show Solution
- 53
- 71
Show Solution
- 119
- 481
Show Solution
- 221
- 209
Show Solution
- 359
- 667
Show Solution
- 1771
Everyday Math
Banking
Frank’s grandmother gave him $100 at his high school graduation. Instead of spending it, Frank opened a bank account. Every week, he added $15 to the account. The table shows how much money Frank had put in the account by the end of each week. Complete the table by filling in the blanks.
Weeks after graduation | Total number of dollars Frank put in the account | Simplified Total |
---|---|---|
0 | 100 | 100 |
1 | 100+15 | 115 |
2 | 100+15⋅2 | 130 |
3 | 100+15⋅3 | |
4 | 100+15⋅[] | |
5 | 100+[] | |
6 | ||
20 | ||
x |
Banking
In March, Gina opened a Christmas club savings account at her bank. She deposited $75 to open the account. Every week, she added $20 to the account. The table shows how much money Gina had put in the account by the end of each week. Complete the table by filling in the blanks.
Weeks after opening the account | Total number of dollars Gina put in the account | Simplified Total |
---|---|---|
0 | 75 | 75 |
1 | 75+20 | 95 |
2 | 75+20⋅2 | 115 |
3 | 75+20⋅3 | |
4 | 75+20⋅[] | |
5 | 75+[] | |
6 | ||
20 | ||
x |
Writing Exercises
If a number is divisible by 2 and by 3, why is it also divisible by 6?
What is the difference between prime numbers and composite numbers?
Prime Factorization and the Least Common Multiple
Find the Prime Factorization of a Composite Number
In the following exercises, find the prime factorization of each number using the factor tree method.
- 86
Show Solution
- 78
- 132
Show Solution
- 455
- 693
Show Solution
- 420
- 115
Show Solution
- 225
- 2475
Show Solution
- 1560
Find the Prime Factorization of a Composite Number
In the following exercises, find the prime factorization of each number using the ladder method.
- 56
Show Solution
- 72
- 168
Show Solution
- 252
- 391
Show Solution
- 400
- 432
Show Solution
- 627
- 2160
Show Solution
- 2520
Find the Prime Factorization of a Composite Number
In the following exercises, find the prime factorization of each number using any method.
- 150
Show Solution
- 180
- 525
Show Solution
- 444
- 36
Show Solution
- 50
- 350
Show Solution
- 144
Find the Least Common Multiple (LCM) of Two Numbers
In the following exercises, find the least common multiple (LCM) by listing multiples.
- 8,12
Show Solution
- 4,3
- 6,15
Show Solution
- 12,16
- 30,40
Show Solution
- 20,30
- 60,75
Show Solution
- 44,55
Find the Least Common Multiple (LCM) of Two Numbers
In the following exercises, find the least common multiple (LCM) by using the prime factors method.
- 8,12
Show Solution
- 12,16
- 24,30
Show Solution
- 28,40
- 70,84
Show Solution
- 84,90
Find the Least Common Multiple (LCM) of Two Numbers
In the following exercises, find the least common multiple (LCM) using any method.
- 6,21
Show Solution
- 9,15
- 24,30
Show Solution
- 32,40
Everyday Math
Grocery shopping
Hot dogs are sold in packages of ten, but hot dog buns come in packs of eight. What is the smallest number of hot dogs and buns that can be purchased if you want to have the same number of hot dogs and buns? (Hint: it is the LCM!)
Grocery shopping
Paper plates are sold in packages of 12 and party cups come in packs of 8. What is the smallest number of plates and cups you can purchase if you want to have the same number of each? (Hint: it is the LCM!)
Writing Exercises
Do you prefer to find the prime factorization of a composite number by using the factor tree method or the ladder method? Why?
Do you prefer to find the LCM by listing multiples or by using the prime factors method? Why?
Chapter Review Exercises
Use the Language of Algebra
Use Variables and Algebraic Symbols
In the following exercises, translate from algebra to English.
- 3⋅8
Show Solution
- 12−x
- 24÷6
Show Solution
- 9+2a
- 50≥47
Show Solution
- 3y<15
- n+4=13
Show Solution
- 32−k=7
Identify Expressions and Equations
In the following exercises, determine if each is an expression or equation.
- 5+u=84
Show Solution
- 36−6s
- 4y−11
Show Solution
- 10x=120
Simplify Expressions with Exponents
In the following exercises, write in exponential form.
- 2⋅2⋅2
Show Solution
- a⋅a⋅a⋅a⋅a
- x⋅x⋅x⋅x⋅x⋅x
Show Solution
- 10⋅10⋅10
Simplify Expressions with Exponents
In the following exercises, write in expanded form.
- 84
Show Solution
- 36
- y5
Show Solution
- n4
Simplify Expressions with Exponents
In the following exercises, simplify each expression.
- 34
Show Solution
- 106
- 27
Show Solution
- 43
Simplify Expressions Using the Order of Operations
In the following exercises, simplify.
- 10+2⋅5
Show Solution
- (10+2)⋅5
- (30+6)÷2
Show Solution
- 30+6÷2
- 72+52
Show Solution
- (7+5)2
- 4+3(10−1)
Show Solution
- (4+3)(10−1)
Evaluate, Simplify, and Translate Expressions
Evaluate an Expression
In the following exercises, evaluate the following expressions.
- 9x−5 when x=7
Show Solution
- y3 when y=5
- 3a−4b when a=10,b=1
Show Solution
- bh when b=7,h=8
Identify Terms, Coefficients and Like Terms
In the following exercises, identify the terms in each expression.
- 12n2+3n+1
Show Solution
- 4x3+11x+3
Identify Terms, Coefficients and Like Terms
In the following exercises, identify the coefficient of each term.
- 6y
Show Solution
- 13x2
In the following exercises, identify the like terms.
- 5x2,3,5y2,3x,x,4
Show Solution
- 8,8r2,8r,3r,r2,3s
Simplify Expressions by Combining Like Terms
In the following exercises, simplify the following expressions by combining like terms.
- 15a+9a
Show Solution
- 12y+3y+y
- 4x+7x+3x
Show Solution
- 6+5c+3
- 8n+2+4n+9
Show Solution
- 19p+5+4p−1+3p
- 7y2+2y+11+3y2−8
Show Solution
- 13x2−x+6+5x2+9x
Translate English Phrases to Algebraic Expressions
In the following exercises, translate the following phrases into algebraic expressions.
- the difference of x and 6
Show Solution
- the sum of 10 and twice a
- the product of 3n and 9
Show Solution
- the quotient of s and 4
- 5 times the sum of y and 1
Show Solution
- 10 less than the product of 5 and z
Translate English Phrases to Algebraic Expressions
In the following exercises, write the algebraic expressions that can be found in each sentence.
- Jack bought a sandwich and a coffee. The cost of the sandwich was $3 more than the cost of the coffee. Call the cost of the coffee c. Write an expression for the cost of the sandwich.
Show Solution
- The number of poetry books on Brianna’s bookshelf is 5 less than twice the number of novels. Call the number of novels n. Write an expression for the number of poetry books.
Subtraction Property of Equality
Determine Whether a Number is a Solution of an Equation
In the following exercises, determine whether each number is a solution to the equation.
Exercise 1
y+16=40
- 24
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- 56
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Exercise 2
d−6=21
- 15
- 27
Exercise 3
4n+12=36
- 6
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- 12
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Exercise 4
20q−10=70
- 3
- 4
Exercise 5
15x−5=10x+45
- 2
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- 10
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Exercise 6
22p−6=18p+86
- 4
- 23
Model the Subtraction Property of Equality
In the following exercises, write the equation modeled by the envelopes and counters and then solve the equation using the subtraction property of equality.
Solve Equations using the Subtraction Property of Equality
In the following exercises, solve each equation using the subtraction property of equality.
- c+8=14
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- v+8=150
- 23=x+12
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- 376=n+265
Solve Equations using the Addition Property of Equality
In the following exercises, solve each equation using the addition property of equality.
- y−7=16
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- k−42=113
- 19=p−15
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- 501=u−399
Translate English Sentences to Algebraic Equations
In the following exercises, translate each English sentence into an algebraic equation.
- The sum of 7 and 33 is equal to 40.
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- The difference of 15 and 3 is equal to 12.
- The product of 4 and 8 is equal to 32.
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- The quotient of 63 and 9 is equal to 7.
- Twice the difference of n and 3 gives 76.
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- The sum of five times y and 4 is 89.
Translate to an Equation and Solve
In the following exercises, translate each English sentence into an algebraic equation and then solve it.
- Eight more than x is equal to 35.
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- 21 less than a is 11.
- The difference of q and 18 is 57.
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- The sum of m and 125 is 240.
Mixed Practice
In the following exercises, solve each equation.
- h−15=27
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- k−11=34
- z+52=85
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- x+93=114
- 27=q+19
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- 38=p+19
- 31=v−25
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- 38=u−16
Finding Multiples and Factors
Identify Multiples of Numbers
In the following exercises, list all the multiples less than 50 for each of the following.
- 3
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- 2
- 8
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- 10
Use Common Divisibility Tests
In the following exercises, using the divisibility tests, determine whether each number is divisible by 2, by 3, by 5, by 6, and by 10.
- 96
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- 250
- 420
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- 625
Find All the Factors of a Number
In the following exercises, find all the factors of each number.
- 30
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- 70
- 180
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- 378
Identify Prime and Composite Numbers
In the following exercises, identify each number as prime or composite.
- 19
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- 51
- 121
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- 219
Prime Factorization and the Least Common Multiple
Find the Prime Factorization of a Composite Number
In the following exercises, find the prime factorization of each number.
- 84
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- 165
- 350
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- 572
Find the Least Common Multiple of Two Numbers
In the following exercises, find the least common multiple of each pair of numbers.
- 9,15
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- 12,20
- 25,35
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- 18,40
Everyday Math
Describe how you have used two topics from The Language of Algebra chapter in your life outside of your math class during the past month.
Chapter Practice Test
In the following exercises, translate from an algebraic equation to English phrases.
- 6⋅4
- 15−x
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In the following exercises, identify each as an expression or equation.
- 5⋅8+10
- x+6=9
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- 3⋅11=33
- Write n⋅n⋅n⋅n⋅n⋅n in exponential form.
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- Write 35 in expanded form and then simplify.
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In the following exercises, simplify, using the order of operations.
- 4+3⋅5
- (8+1)⋅4
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- 1+6(3−1)
- (8+4)÷3+1
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- (1+4)2
- 5[2+7(9−8)]
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In the following exercises, evaluate each expression.
- 8x−3 when x=4
- y3 when y=5
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- 6a−2b when a=5,b=7
- hw when h=12,w=3
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Simplify by combining like terms.
- 6x+8x
- 9m+10+m+3
In the following exercises, translate each phrase into an algebraic expression.
- 5 more than x
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- the quotient of 12 and y
- three times the difference of a and b
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- Caroline has 3 fewer earrings on her left ear than on her right ear. Call the number of earrings on her right ear, r. Write an expression for the number of earrings on her left ear.
In the following exercises, solve each equation.
- n−6=25
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- x+58=71
In the following exercises, translate each English sentence into an algebraic equation and then solve it.
- 15 less than y is 32.
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- the sum of a and 129 is 164.
- List all the multiples of 4, that are less than 50.
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- Find all the factors of 90.
- Find the prime factorization of 1080.
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- Find the LCM (Least Common Multiple) of 24 and 40.