Lesson 8-2: Addition and Subtraction Equations

What does it mean to 'isolate the variable' in an equation?

• To hide the variable

• To multiply the variable by zero

• To add numbers to the variable

• To get the variable by itself on one side

What is the inverse operation of addition?

• Division

• Addition

• Multiplication

• Subtraction

• x = 7

• x = 21

• x = 14

• x = 28

• x = 10

• x = 25

• x = 14

• x = 15

• a = 5

• a = 10

• a = 7

• a = 15

• c = 76

• c = 42

• c = 32

• c = 64

If you have the equation X + 4 = 12, what should you do to solve for X?

• Add 4 to both sides

• Subtract 4 from both sides

• Divide both sides by 4

• Multiply both sides by 4

In the equation X - 5 = 30, what is the value of X?

• 40

• 35

• 30

• 25

• g = 30

• g = 35

• g = 25

• g = 20

• n = 29

• n = 31

• n = 33

• n = 34