31=7+2x

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Solution for 31=7+2x equation: 



31=7+2x

We move all terms to the left:

31-(7+2x)=0

We add all the numbers together, and all the variables

-(2x+7)+31=0

We get rid of parentheses

-2x-7+31=0

We add all the numbers together, and all the variables

-2x+24=0

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

-2x=-24

x=-24/-2

x=+12

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