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Mat 116

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What is the solution of the system
7r - 5s = 36 and 5r + 7s = 68

  • Mat 116 -

    first by 7 -----> 49r - 35s = 252
    second by 5 --> 25r + 35s = 340
    add them
    74r = 592
    r = 8

    sub back into one of the original equations to find s

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