Question

The bill for repairing a car was $311 .The cost for parts was $125 .The cost for Labor was$ 31 per hour .How many hours did the repair work taking?????

Answer 1

bill=parts+labor
labor=31 times hours or h
parts=125
bill=311


311=125+31h
minus 125 both sides
186=31h
divide both sides by 31
6=h

6 hours

Answer 2

311-125= 186
186/ 31=6
It took 6 hours.