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March 25, 2017

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use subsitution system to solve
4x+5y=21
Y=3x-11

  • math - ,

    4x+5y=21
    Y=3x-11

    4x + 5(3x - 11) = 21
    4x + 15x - 55 = 21
    19x = 21 + 55
    19x = 76
    x = 4

    y = (3 * 4) - 11

    y = 1

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