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March 25, 2017

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what is the solution to the system containing the equation ? x + y = -8 and -3x + 2y = 9

  • Algebra - ,

    Multiply first equation by 3.

    3x + 3y = -24

    -3x + 2y = 9

    Add the two equations.

    5y = -15

    y = -3

    Put y value in one equation.

    x + (-3) = -8

    x = -5

    Check by putting both values in the other equation.

    (-3)(-5) + 2(-3) = 9

    15-6 = 9

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