31=-9+8x

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Solution for 31=-9+8x equation: 



31=-9+8x

We move all terms to the left:

31-(-9+8x)=0

We add all the numbers together, and all the variables

-(8x-9)+31=0

We get rid of parentheses

-8x+9+31=0

We add all the numbers together, and all the variables

-8x+40=0

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

-8x=-40

x=-40/-8

x=+5

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