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5 September, 00:26

9) Solve by the elimination method.

x + y = - 5

x - y = 11

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Answers (1)
  1. 5 September, 00:33
    0
    x = 3

    y = - 8

    Step-by-step explanation:

    x + y = - 5

    x - y = 11

    Since the y's will cancel out, we don't need to modify the two equations in any way.

    Now, just add the two equations.

    x + x = 2x

    y + (-y) = 0

    -5 + 11 = 6

    2x = 6

    Divide by 2.

    x = 3

    To find y, plug 3 in as "x" in one of the two equations.

    3 + y = - 5

    y = - 8
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