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15 February, 10:37

3x - y = 2 y = 2x - 9 what is x and y using substitution

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Answers (2)
  1. 15 February, 12:06
    0
    3x - y = 2

    y = 2x - 9

    Substitute:

    3x - 2x - 9 = 2

    x - 9 = 2

    x = 11

    Substitute your answer into any equation:

    y = 2x - 9

    y = 2 (11) - 9

    y = 22 - 9

    y = 13

    Answer:

    x = 11; y = 13
  2. 15 February, 13:06
    0
    3x-y=2

    y=2x-9

    Substitute y

    3x - 2x-9 = 2

    Solve

    X-9=2

    X=11
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