The total cost of repairing a car is the sum of the amount paid for parts and the amount paid for labor. You paid $78 for parts and $45 for each hour of labor. The total cost to repair was $168. How many hours did it take to repair the car?
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Respuesta:
2 hours
Explicación paso a paso:
y=45.x+78
168=45.x+78
168-78=45x
90=45x
90/45=x
2=x
it took two hours to repair the car
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