X-9y=31

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Solution for X-9y=31 equation: 



X-9X=31

We move all terms to the left:

X-9X-(31)=0

We add all the numbers together, and all the variables

-8X-31=0

We move all terms containing X to the left, all other terms to the right

-8X=31

X=31/-8

X=-3+7/8

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