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10-03-2017
Mathematics

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What is the solution using the substitution method for x+4y=18; x+8y=38

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10-03-2017

x+4y=18
4y=18-x
4y-18=-x
-4y+18=x

x+8y=38
-4y+18+8y=38
4y=20
y=5

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