Find the solution of this system of equations. Separate the x- and y-values with a comma. x – 4y = 12 and x – y = 0

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Find the solution of this system of equations. Separate the x- and y-values with a comma. x – 4y = 12 and x – y = 0

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    2021-10-14T00:58:46+00:00

    Use elimination and subtitution method to solve the problem.
    First, eliminate x and you’ll find the value of y
    x – 4y = 12
    x –  y  = 0
    ————— – (substract)
         -3y = 12
            y = 12/-3
            y = -4

    Second, subtitute -4 as y and you’ll find the value of x
    x – y = 0
    x- (-4) = 0
    x + 4 = 0
    x = -4

    The solution
    x,y = -4,-4

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