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6 November, 00:30

What is - 3x+5y=-2 2x-2y=1

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  1. 6 November, 02:12
    0
    Solve equation 2 for x:

    2x - 2y = - 12

    2x = 2y - 12

    x = y - 6

    .

    Using the above definition of x, we plug it in to equation 1 and solve for y:

    2x + 5y = 2

    2 (y - 6) + 5y = 2

    2y - 12 + 5y = 2

    7y - 12 = 2

    7y = 14

    y = 2

    .

    Plug the above back into equation 2 and solve for x:

    2x - 2y = - 12

    2x - 2 (2) = - 12

    2x - 4 = - 12

    2x = - 8

    x = - 4

    .

    Solution:

    x = - 4

    y = 2
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