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24 September, 13:30

A1 Plumbing Service charges $35 per hour plus a $25 travel charge for a service call. Good Guys Plumbing Repair charges $40 per hour for a service call with no travel charge. How many hours must a service call be for it to be better for you to call A1 Plumbing Service?

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  1. 24 September, 15:05
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    A1 = 35x+25

    Good guys = 40x

    35x+25 = 40x

    subtract 3x x from each side

    25 = 5x

    divide each side by 5

    x = 25/5 = 5

    so 5 hours they would be the same cost, anything over 5 hours and A1 would be better

    so X>5 for A1 to be the better price
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