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x - 2y=0 so x = 2y

9y - 4x=1

Substituting for x, 9y-4*(2y) = 1 or 9y-8y = 1 so that y = 1

then x = 2y = 2*1 = 2

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Q: X-2y equals o 9y-4x equals 1 substitution method?
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