31=15+8x

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Solution for 31=15+8x equation: 



31=15+8x

We move all terms to the left:

31-(15+8x)=0

We add all the numbers together, and all the variables

-(8x+15)+31=0

We get rid of parentheses

-8x-15+31=0

We add all the numbers together, and all the variables

-8x+16=0

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

-8x=-16

x=-16/-8

x=+2

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