Solving Addition and Subtraction Equations

y - 33 = 147

In this scale model what is being represented?

• unbalance equation

• added variables to each side

• added +5 to each side

• added -2 to each side

what is the value of the variable

• 12

• 2

• -2

• -12

What is the first step to solve this equation?
12 = d - 8

• Add 8 to both sides

• Subtract 8 from both sides

• Add 8 to one side and subtract 8 from the other

• Subtract 8 from one side

Solve for x. 
x - 7 = 2

• 7 

• 2 

• 9

• 5

Solve for m.
8 = m - 3 

• 11

• 8

• 3

• 5

Solve for g. 
12 = g - 4

• 12

• 16

• 4 

• 8

Which equation represents the question?
Matt's height is 4 inches less that Robert's height. Matt is 58 inches tall. How tall is Robert? 

• r - 4 = 58

• r + 4 = 58

• 58 + r = 4

• 58 - r = 4

What is the inverse operation of subtracting (-)?

• Adding (+)

• Subtracting (-)

• Multiplying (×)

• Dividing (÷)

x + 18 = 25

• x = 43

• x = 7

• x = - 7

• x = -43