Mathematics, 03.01.2020 21:31, yeld

Two mechanics worked on a car. the first mechanic worked for 15 hours, and the second mechanic worked for 5 hours. together they charged a total of $1800 . what was the rate charged per hour by each mechanic if the sum of the two rates was $150 per hour?

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Two mechanics worked on a car. the first mechanic worked for 15 hours, and the second mechanic worke...