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22 January, 09:40

Solve each system using substitution: 7x-2y=1 2y=x-1

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  1. 22 January, 10:02
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    Hello:

    7x-2y=1 ... (1)

    2y=x-1 ... (2)

    substitution 2y in (1):

    7x - (x-1) = 1

    7x-x+1 = 1

    7x = 0

    x=0

    in (2) : 2y = 0-1

    2y = - 1 y = - 1/2

    the system have one solution : (0; - 1/2)
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