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3 May, 00:15

5x - y = 7 Solving Systems by Substitution

-3x - 2y = - 12

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Answers (1)
  1. 3 May, 00:45
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    Switch the equation around.

    5x - y = 7

    y=5x-7

    Then, substitute.

    -3x - 2y = - 12

    -3x - 2 (5x-7) = - 12

    -3x - 10x + 14 = - 12

    -13x = - 26

    x=2
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