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11 October, 19:27

Solve each linear equation x+4y=18 x+8y=38

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  1. 11 October, 21:24
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    Answer: {x = - 2, y = 5

    Step-by-step explanation:

    {x + 4 y = 18 | (equation 1)

    {x + 8 y = 38 | (equation 2)

    Subtract equation 1 from equation 2:

    {x + 4 y = 18 | (equation 1)

    {0 x+4 y = 20 | (equation 2)

    Divide equation 2 by 4:

    {x + 4 y = 18 | (equation 1)

    {0 x+y = 5 | (equation 2)

    Subtract 4 * (equation 2) from equation 1:

    {x+0 y = - 2 | (equation 1)

    {0 x+y = 5 | (equation 2)

    Collect results:

    Answer: {x = - 2, y = 5
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