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28 January, 03:42

Shoe me the answer to this problem x=y+1 4x-5y=-9

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  1. 28 January, 03:59
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    Solve the following system:

    {x = y + 1 | (equation 1)

    {4 x - 5 y = - 9 | (equation 2)

    Express the system in standard form:

    {x - y = 1 | (equation 1)

    {4 x - 5 y = - 9 | (equation 2)

    Swap equation 1 with equation 2:

    {4 x - 5 y = - 9 | (equation 1)

    {x - y = 1 | (equation 2)

    Subtract 1/4 * (equation 1) from equation 2:

    {4 x - 5 y = - 9 | (equation 1)

    {0 x+y/4 = 13/4 | (equation 2)

    Multiply equation 2 by 4:

    {4 x - 5 y = - 9 | (equation 1)

    {0 x+y = 13 | (equation 2)

    Add 5 * (equation 2) to equation 1:

    {4 x+0 y = 56 | (equation 1)

    {0 x+y = 13 | (equation 2)

    Divide equation 1 by 4:

    {x+0 y = 14 | (equation 1)

    {0 x+y = 13 | (equation 2)

    Collect results:

    Answer: {x = 14

    {y = 13
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