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11 May, 13:45

Solve using elimination.

3x + 9y = - 15

-5x - 9y = - 5

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Answers (1)
  1. 11 May, 13:57
    0
    (x, y) = (10, - 5)

    Step-by-step explanation:

    3x + 9y = - 15 (eq 1)

    -5x - 9y = - 5 (eq 2)

    add equation 1 and 2

    3x + 9y - 5x - 9y = - 15 - 5

    -2x = - 20

    x = 10

    put value of x in equation 1

    3 (10) + 9y = -15

    30 + 9y = - 15

    9y = - 45

    y = - 5
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