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4 February, 19:21

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?

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  1. 4 February, 21:22
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    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
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