X-7+8x=31

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Solution for X-7+8x=31 equation: 



X-7+8X=31

We move all terms to the left:

X-7+8X-(31)=0

We add all the numbers together, and all the variables

9X-38=0

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

9X=38

X=38/9

X=4+2/9

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