Problema Solution
Two mechanics worked on a car. The first mechanic worked for hours, and the second mechanic worked for hours. Together they charged a total of . What was the rate charged per hour by each mechanic if the sum of the two rates was per hour?
Answer provided by our tutors
Let x and y be rates per hour of mechanics 1 and 2, respectively
20x + 5y = 2900
x + y = 235
y = 235-x
20x + 5(235-x) = 2900
15x = 1725
x = 115
y = 235-115 = 120
Mechanic 1 charged $115 per hour
Mechanic 2 charged $120 per hour