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24 August, 11:35

What is the system subtitution of 2y=x+1; - 2x-y=7

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  1. 24 August, 13:29
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    Solve for x in 2y = x + 1

    x = 2y - 1

    Substitute x = 2y - 1 into - 2x - y = 7

    -5y + 2 = 7

    Solve for y in - 5y + 2 = 7

    y = - 1

    Substitute y = - 1 into x = 2y - 1

    x = - 3

    Therefore,

    x = - 3

    y = - 1
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