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13 July, 20:23

4x-2y=12

-4x-9=54

How can you order a ladder?

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Answers (1)
  1. 13 July, 23:06
    0
    Equations:

    4x - 2y = 12

    -4x - 9y = 54

    Multiple them in both sides

    4x - 2y - 4x - 9y = 12 + 54

    -2y - 9y = 66

    -11y = 66

    y = - 6

    If y = - 6 then put y in first or second equation.

    I put it in first equation

    4x - 2. (-6) = 12

    4x + 12 = 12

    x = 0

    Therefore

    (x, y) = (0, - 6)
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