x+31=3x-13

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Solution for x+31=3x-13 equation: 



x+31=3x-13

We move all terms to the left:

x+31-(3x-13)=0

We get rid of parentheses

x-3x+13+31=0

We add all the numbers together, and all the variables

-2x+44=0

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

-2x=-44

x=-44/-2

x=+22

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