Question

A plumber charges $75 for a service call, plus a $40 per hour. If the plumber's bill was $235, then how many hours was he there?

Answer 1

4 hours

Explanation:

235-75 one time fee, so subtract = 160

160/40 = 4

Answer 2

4 Hours

40x - 75 = 235

-75 -75

40x = 160

40x/40 = 160/40

x = 4