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9 December, 07:49

Substitution: (x=2y) (y=x-2)

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  1. 9 December, 09:04
    0
    2=y

    4=x

    Step-by-step explanation:

    x=2y

    y=2y-2

    add 2 to both sides

    2+y=2y

    subtract y from both sides

    2=1y

    2=y
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