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March 30, 2017

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Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth.
y=-2+7x
10x-7y=209

  • Algebra - ,

    so, make the substitution:

    10x - 7(-2+7x) = 209
    10x + 14 - 49x = 209
    -39x = 195
    x = -5
    y=-2+7(-5) = -37

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