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10 December, 00:19

Substitution method for 7x-2y=1 & x-2y=1

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  1. 10 December, 00:24
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    We want to use the Substitution method to solve

    7x - 2y = 1 (1)

    x - 2y = 1 (2)

    From equation (1), obtain

    2y = 7x - 1 (3)

    Substitute (3) into (2).

    x - (7x - 1) = 1

    -6x + 1 = 1

    -6x = 0

    x = 0

    From (3), obtain

    2y = 7*0 - 1 = - 1

    y = - 1/2

    Answer: (0, - 1/2) or x=0, y = - 1/2.
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