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21 January, 06:10

5x+2y=-4

-x+2y=8

Solve the system

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Answers (1)
  1. 21 January, 06:12
    0
    Subtract the second equation from the first.

    ... (5x + 2y) - (-x + 2y) = (-4) - (8)

    ... 6x = - 12

    ... x = - 2

    ... - (-2) + 2y = 8

    ... 2y = 6

    ... y = 3

    The solution is (x, y) = (-2, 3).
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