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2 August, 06:46

3x+4y=-23

2y-x=-29

What is the (x, y) solution to the system of equations above?

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Answers (1)
  1. 2 August, 07:06
    0
    x=7

    y = - 11

    Step-by-step explanation:

    3x+4y = - 23 equation 1

    2y-x = - 29 equation 2

    using equation 2 we have:

    2y + 29 = x equation 3

    using equation 3 in equation 1 we have:

    3x+4y = - 23

    3 (2y + 29) + 4y = - 23

    6y + 87 + 4y = -23

    10y + 87 = - 23

    10y = - 23-87

    10y = - 110

    y = - 110/10

    y = - 11

    so we have:

    2y + 29 = x

    2 (-11) + 29 = x

    we have:

    x = 7
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