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12 January, 23:58

Solve

2x-3y=-4

5x+7y=1

+2
Answers (1)
  1. 13 January, 00:27
    0
    x = - 25/29, y = 22/29

    Step-by-step explanation:

    Solve the following system:

    {2 x - 3 y = - 4 | (equation 1)

    5 x + 7 y = 1 | (equation 2)

    Swap equation 1 with equation 2:

    {5 x + 7 y = 1 | (equation 1)

    2 x - 3 y = - 4 | (equation 2)

    Subtract 2/5 * (equation 1) from equation 2:

    {5 x + 7 y = 1 | (equation 1)

    0 x - (29 y) / 5 = (-22) / 5 | (equation 2)

    Multiply equation 2 by - 5:

    {5 x + 7 y = 1 | (equation 1)

    0 x+29 y = 22 | (equation 2)

    Divide equation 2 by 29:

    {5 x + 7 y = 1 | (equation 1)

    0 x+y = 22/29 | (equation 2)

    Subtract 7 * (equation 2) from equation 1:

    {5 x+0 y = (-125) / 29 | (equation 1)

    0 x+y = 22/29 | (equation 2)

    Divide equation 1 by 5:

    {x+0 y = (-25) / 29 | (equation 1)

    0 x+y = 22/29 | (equation 2)

    Collect results:

    Answer: {x = - 25/29, y = 22/29
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