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3 February, 14:52

3x + 2y = 6

2x + 5y = 7

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Answers (2)
  1. 3 February, 18:38
    0
    3x + 2y = 6

    2x + 5y = 7

    Multiply the first by 5, second by 2, then subtract

    15x + 10y = 30

    4x + 10y = 14

    11x = 16

    x = 16/11

    10y = 30 - 15x = 30 - 15 (16/11) = 90/11

    y = 9/11

    Answer: x=16/11, y=9/11
  2. 3 February, 18:50
    0
    3x + 2y = - 6

    2x + 5y = 7

    Multiply first by 5, second by 2,

    15x + 10y = 30

    4x + 10y = 14

    11x = 16

    x = 16/11

    10y = 30 - 15x = 30 - 15 (16/11) = 90/11

    y = 9/11

    solve x=16/11 y=9/11
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