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4 March, 22:21

3x+4y=2 4x-4y=12 elimination

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Answers (2)
  1. 4 March, 22:24
    0
    3x+4y=2

    4x-4y=12

    Add both

    7x=14

    X=2

    Substitute value of x in first equation

    Y=-1
  2. 4 March, 22:42
    0
    3x+4y=2

    + 4x-4y=12 add them since 4y and - 4y can cancel out

    7x=14 divide each side by 7

    x=2

    3x+4y=2 x=2

    3 (2) + 4y=2 substitute

    6+4y=2

    -6 - 6

    4y=-4 divide each side by 4

    y=-1
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