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14 November, 13:22

X + 3y = - 12

y + 3 = - { (x - 3)

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Answers (1)
  1. 14 November, 14:52
    0
    x = 6, y = - 6

    Step-by-step explanation:

    solve for x and y

    x + 3y = - 12

    y + 3 = - x + 3

    add

    (x + 3y) + - x + 3 = - 12 + y + 3

    3y + 3 = y - 9

    2y + 3 = - 9

    2y = - 12

    y = - 6

    x + 3 (-6) = - 12

    x - 18 = - 12

    x = 6
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