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9 December, 09:15

Substitution for

3x-y=8

x+6y-8=0

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Answers (1)
  1. 9 December, 09:31
    0
    -y=8-3x

    y=-8+3x

    x+6 (-8+3x) - 8=0

    x-48+18x-8=0

    19x-56=0

    19x=56

    x=2.95

    3 (2.95) - y=8

    8.85-y=8

    -y=-.85

    y=.85

    x=2.95

    y=.85
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