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MATH

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Solve for y in the following system of equations:

x - y = -1
3x + 5y = 21

  • MATH -

    to Eliminate x
    x - y = -1
    3x + 5y = 21

    multiply (x - y = -1) by -3
    -3x + 3y = 3
    3x + 5y = 21
    add both equations
    0 + 8y = 24
    8y = 24
    y = 3

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