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12-12-2018
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?

Respuesta :

12-12-2018

30 + 75x= 210
Subtract 30 from both sides
75x=180
Divide both sides by 75
X =2.4

Worked 2.4 hours

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