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14 August, 14:56

2y = x + 3

5y = x - 7

What is the solution set of the given system?

{ (-1/3, - 4/3) }

{ (1/3, 4/3) }

{ (-29/3, - 10/3) }

{ (29/3, 10/3

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Answers (1)
  1. 14 August, 15:21
    0
    { (-29/3, - 10/3) }

    Step-by-step explanation:

    Solve the following system:

    {2 y = x + 3 | (equation 1)

    {5 y = x - 7 | (equation 2)

    Express the system in standard form:

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

    {-x + 5 y = - 7 | (equation 2)

    Subtract equation 1 from equation 2:

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

    {0 x+3 y = - 10 | (equation 2)

    Divide equation 2 by 3:

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

    0 x+y = (-10) / 3 | (equation 2)

    Subtract 2 * (equation 2) from equation 1:

    {-x+0 y = 29/3 | (equation 1)

    {0 x+y = - 10/3 | (equation 2)

    Multiply equation 1 by - 1:

    {x+0 y = (-29) / 3 | (equation 1)

    {0 x+y = - 10/3 | (equation 2)

    Collect results:

    Answer: {x = - 29/3, y = - 10/3
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