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10-01-2019
Mathematics

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

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12-01-2019

Answer:

2.4 hours of service

Step-by-step 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

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