Question

Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second mechanic worked for 5 hours. Together they charged a total of $1325 . What was the rate charged per hour by each mechanic if the sum of the two rates was $160 per hour?

Answer 1

Answer:

10x + 5y = 1325

x + y = 160 --> y = 160 - x

II in I

10x + 5(160 - x) = 1325

10x + 800 - 5x = 1325

5x = 525

x = 105

y = 160 - 105 = 55