algebra

george drove to two town at 60 miles per hour and drove back home at 30 miles per hour. what is the distance to town if the whole trip took 9 hours hrs

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  1. time to get there = d/60
    time to get back = d/30
    so
    d/60 + d/30 = 9

    3 d/60 = 9

    d = 3 * 60

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  2. 180 miles

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