-31=x-3x-9

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Solution for -31=x-3x-9 equation: 



-31=x-3x-9

We move all terms to the left:

-31-(x-3x-9)=0

We add all the numbers together, and all the variables

-(-2x-9)-31=0

We get rid of parentheses

2x+9-31=0

We add all the numbers together, and all the variables

2x-22=0

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

2x=22

x=22/2

x=11

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