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13 September, 11:01

Y=-5x+1 y=3x-2 is (3,8) a solution of the system

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  1. 13 September, 13:09
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    x = 3/8, y = - 7/8 or x = 0.375, y = - 0.975 decimal

    Step-by-step explanation:

    Solve the following system:

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

    y = 3 x - 2 | (equation 2)

    Express the system in standard form:

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

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

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

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

    0 x + (8 y) / 5 = - 7/5 | (equation 2)

    Multiply equation 2 by 5:

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

    0 x+8 y = - 7 | (equation 2)

    Divide equation 2 by 8:

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

    0 x+y = - 7/8 | (equation 2)

    Subtract equation 2 from equation 1:

    {5 x+0 y = 15/8 | (equation 1)

    0 x+y = - 7/8 | (equation 2)

    Divide equation 1 by 5:

    {x+0 y = 3/8 | (equation 1)

    0 x+y = - 7/8 | (equation 2)

    Collect results:

    Answer: {x = 3/8, y = - 7/8
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