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27 December, 07:40

Y - x = 9 and 8 = - 2x - 4y

(solve for y)

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Answers (1)
  1. 27 December, 08:07
    0
    Y - x = 9

    -x = 9 + y

    x = - 9 - y

    8 = - 2x - 4y

    8 = - 2 (-9 - y) - 4y

    8 = 18 + 2y - 4y

    -10 = - 2y

    10 = 2y

    y = 5
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