two mechanics worked on a car for the total that they charged of $1625. The first mechanic worked for 5 hours. The second mechanic worked for 15 hours. what was the rate charged per hour if the sum of the two rates were $145.

first m

second m

Sum of rate charge per mechanic \[r_1 + r_2 = 145\]

Total rate charge \[5r_1 + 15r_2 = 1625\]

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