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25 December, 14:40

Y=-5x - 26

5y = 3x - 18

+1
Answers (1)
  1. 25 December, 15:08
    0
    x = - 4, y = - 6

    Step-by-step explanation:

    Solve the following system:

    {y = - 5 x - 26 | (equation 1)

    5 y = 3 x - 18 | (equation 2)

    Express the system in standard form:

    {5 x + y = - 26 | (equation 1)

    - (3 x) + 5 y = - 18 | (equation 2)

    Add 3/5 * (equation 1) to equation 2:

    {5 x + y = - 26 | (equation 1)

    0 x + (28 y) / 5 = (-168) / 5 | (equation 2)

    Multiply equation 2 by 5/28:

    {5 x + y = - 26 | (equation 1)

    0 x+y = - 6 | (equation 2)

    Subtract equation 2 from equation 1:

    {5 x+0 y = - 20 | (equation 1)

    0 x+y = - 6 | (equation 2)

    Divide equation 1 by 5:

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

    0 x+y = - 6 | (equation 2)

    Collect results:

    Answer: {x = - 4, y = - 6
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