How to Solve an Equation

w + 12 = 20

• w = 32

• w = -32

• w = 8

• w = -8

y + 8 = 45

• y = 8

• y = 37

• y = 45

• y = 27

m - 42 = 25

• m = 42

• m = 67

• m = 57

• m = 25

x/4 = 100

• x = 400

• x = 4

• x = 25

• x = 100

1. Kylie and Ricardo decide to start a dog watching business for their neighborhood. 

3. Kylie thinks it would be best to charge customers $27 for a membership and then $5 per time they walk a dog. 

5. Ricardo thinks it would be best to charge $8 per dog walk. 

7. For what number of walks will their two plans cost the same amount of money?

Mathematical Equivalence

ON

• x=3

• x=2

• x=-2

• x=1

Kylie and Ricardo decide to start a dog watching business for their neighborhood. Kylie thinks it would be best to charge customers $27 for a membership and then $5 per time they walk a dog. Ricardo thinks it would be best to charge $8 per dog walk. For what number of walks will their two plans cost the same amount of money?

Mathematical Equivalence

ON

• m=3

• m=-4

• m=-1

• All real numbers

• x=3

• x=-7

• x=0

• No Solution

• 2

• -2

• 8

• 8