Equations

Solve:
3(x - 2) = 18

• 6.7

• 4

• 8

• -4

Which property justifies the work in solving this equation?

• Addition Property of Equality

• Additive Inverse Property

• Identity Property of Addition

• Subtraction Property of Equality

How do you solve 9x - 4 = 23

• divide both sides by 4, then add 9

• divide both sides by 9, then add 4

• add 4 to both sides, then divide both sides by 9

• add 4 to both sides, then divide by 23

Which property of real numbers justifies the work shown from Step 1 to Step 2?

• Distributive Property

• Commutative Property

• Identity Property

• Associative Property

Which property of real numbers was used to get from Step 3 to Step 4?

• Addition Property of Equality

• Subtraction Property of Equality

• Additive Inverse Property

• Substitution Property

Which equation would describe "two times a number plus five equals 15"?

• x + 5 = 15

• 2x + 5=15

• x + 2(5) = 15

• 2(x + 5) = 15

A gymnastics center charges a $60 registration fee and $15 per class. Olivia registers to take a class and pays a total of $210. Which equation can be used to determine how many classes Olivia signed up for?

• 60 - 15x = 210 

• 15x - 60 = 210

• 15x + 60 = 210 

• 210 + 15x = 60 

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

x ÷ 2 = 12

• x = 24

• x = 6

• x = 20

• x = 10

x + 40 = 56

• x = 16

• x = 96

• x = 15

• x = 10