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

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Question 1104884: An electrician charges $30 for a service call, plus $75 per hour of service. If he charges $210, how many hours did he work?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Cost is $30 (fixed)+$75*h variable, where h=hours
210=30+75h
75h=180
h=2.4 hours