Algebraic Equations Addition and Subtraction

The sum of 8 and a number h is 12.

• h - 8 = 12

• 8 - h = 12

• 8 + h = 12

• 12 + h = 8

3 3/4 = r + 1/8

• 3 5/8

• -3 5/8

• -3 7/8

• 3 7/8

k - 10 = 7

• -3

• 3

• 17

• - 17

What is one way you can check your to see if the value for the variable is correct?

• Dude.. it's right

• Add your answer to the original value

• Opposite of the variable is -2

• Substitute your answer to the original equation and see if its true.

What is the inverse operation needed to solve for p?
594 = p +  600

• subtraction

• addition

• multiplication

• division 

Solve for a.    19  + a  =  -50

• a = 69

• a =  -31

• a = -31

• a = -69

Solve for x.    x - 8 = -5 

• 13

• -13

• 3

• -3

Solve for x.    -16+ x= -15

• 2

• 1

• -1

• 0

Solve for a.    20  + a  =  -50

• -30

• 30

• 70

• -70

r - 7.2 = 22.8

• 30

• 15.6

• 13.6

• -30