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algebra

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if you can buy 2 pair of pants and 1 shirt for 79.85$ before tax is added and 1 pair of pants and 2 shirts for 69.85$ before tax is added , how much does a shirt cost ?

  • algebra -

    2p + 1s = 7985
    1p + 2s = 6985

    first x 2 --->

    4p + 2s = 15970
    1p + 2s = 6985

    subtract them

    3p = 8985
    p = 2995

    carry on from there

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