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1 January, 06:37

10x + 10y = - 10

9x + 10y = - 18

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Answers (2)
  1. 1 January, 06:38
    0
    (8,-9)
  2. 1 January, 06:56
    0
    Step-by-step explanation:

    10x+10y=-10

    9x+10y=18

    = 10x+10y=-10

    -9x-10y=18

    = x=8

    step two is to find y:

    10x+10y=-10

    10 (8) + 10y=-10

    80+10y=-10

    10y=-90

    y=-9

    your answer:

    (x, y) = (8,-9)
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