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24 March, 14:20

4x + 6y = - 5

8x = 12y - 10

Solve the system

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Answers (1)
  1. 24 March, 15:58
    0
    x = - 5/4, y = 0

    Step-by-step explanation:

    Solve the following system:

    {4 x + 6 y = - 5 | (equation 1)

    {8 x = 12 y - 10 | (equation 2)

    Express the system in standard form:

    {4 x + 6 y = - 5 | (equation 1)

    {8 x - 12 y = - 10 | (equation 2)

    Swap equation 1 with equation 2:

    {8 x - 12 y = - 10 | (equation 1)

    {4 x + 6 y = - 5 | (equation 2)

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

    {8 x - 12 y = - 10 | (equation 1)

    {0 x+12 y = 0 | (equation 2)

    Divide equation 1 by 2:

    {4 x - 6 y = - 5 | (equation 1)

    {0 x+12 y = 0 | (equation 2)

    Divide equation 2 by 12:

    {4 x - 6 y = - 5 | (equation 1)

    {0 x+y = 0 | (equation 2)

    Add 6 * (equation 2) to equation 1:

    {4 x+0 y = - 5 | (equation 1)

    {0 x+y = 0 | (equation 2)

    Divide equation 1 by 4:

    {x+0 y = (-5) / 4 | (equation 1)

    {0 x+y = 0 | (equation 2)

    Collect results:

    Answer: {x = - 5/4, y = 0
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