31-3*x=3+x

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Solution for 31-3*x=3+x equation: 



31-3x=3+x

We move all terms to the left:

31-3x-(3+x)=0

We add all the numbers together, and all the variables

-3x-(x+3)+31=0

We get rid of parentheses

-3x-x-3+31=0

We add all the numbers together, and all the variables

-4x+28=0

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

-4x=-28

x=-28/-4

x=+7

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