Question

Two mechanics worked on a car.The first mechanic charged $85 per hour, andthe second mechanic charged $70 per hour.The mechanics worked for a combinedtotal of 20 hours, and together they charged a total of $1625.How long did each mechanic work?

Answer 1

70x+85(20-x)=1625
Solve for x
X=5 for 70

X=15 for 85