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1 October, 13:48

7x+2y=-13

-3x-8y=-23

+3
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  1. 1 October, 14:08
    0
    X=-3

    y=4

    7 (-3) = - 21+2 (4) = - 13

    -3 (-3) = 9-8 (4) = - 32

    9-32=-23
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