Question

Mai earns $7 an hour mowing lawns. Her friend Priya earns $8.50 an hour. If Mai started with $15, how many hours will it take both friends to make the same amount of money?

Answer 1

7x+15=8.5x

x=10

Standard form:

−3

2

x + 15 = 0

Factorization:

−3

2

(x − 10) = 0

Solutions:

x = 30

3

= 10

Answer 2

Mai: y = 7x + 15
Priya: y = 8.5x
7x + 15 = 8.5x
15 = 1.5x, x = 10
It takes 10 hours