Question

Two mechanics worked on a car. The first mechanic charged $115 per hour, and the second mechanic charged $55 per hour. The mechanics worked for a combined total of 35 hours, and together they charged a total of $3125 . How long did each mechanic work?

Answer 1

You have to use the equation 115h+35h=3125 and substitute until you find the answer. I'll try and figure it out while I'm eating and comment again