Question

An electrician charges $30 for a service call, plus $75 per hour of service. If he charged $210, how many hours did he work?

Answer 1

2.4 hours of service

Explanation:

Set up an equation (h = hours):

30 + 75h = 210

Subtract 30 from each side:

75h = 180

Divide both sides by 75:

h = 2.4