Solving Addition and Subtraction Equations

How do we solve f - 12 = -4

• add -12 to both sides

• subtract 12 from both sides

• add 12 to both sides

• add 4 to both sides

7 + g = 11

• g = 4

• g = -4

• g = 18

• g = -18

Bob is exercising and eating right to lose weight. After losing 26 pounds, Bob weighs 231 pounds. What was Bob’s weight before he started exercising and eating right?

Write an equation to solve the problem. Use the variable (r) for his initial weight amount

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x - 3 + 6x + 9 = 48

• x = 7

• x = 6

• x = - 3

• x = 9

What is the inverse (opposite) of addition?

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What is the inverse (opposite) of subtraction?

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Figure out what n equals in this equation:
6n + 4 = -26

• n=-6

• n= -5

• n= 8

• n= -4

3c + 5 = 23

• c = 3

• c = 6

• c = 7

• c = 18

What is the inverse operation needed to solve for p?
765 = p - 254

• subtraction

• addition

• multiplication

• division

4x + 22 = -34

• -14

• -22

• 16

• -20