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11 July, 07:38

A youth group and their leaders visited Mammoth Cave. Two adults and 5 students in one van paid $77 for the grand Avenue tour of the cave. Two adults and 7 students in a second van paid $95 for the same tour. Find the adult price and the student price of the tour.

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  1. 11 July, 07:45
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    2a+7s=95

    -2a-5s=-77

    2s=18, s=9, making 2a+7s=95 become:

    2a+7 (9) = 95

    2a+63=95

    2a=32

    a=16

    So adult price is $16.00

    check ... a=16, s=9

    2a+7s=95

    32+63=95

    95=95

    2a+5s=77

    32+45=77

    77=77

    correct
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