-2x-21=-6x+31

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Solution for -2x-21=-6x+31 equation: 



-2x-21=-6x+31

We move all terms to the left:

-2x-21-(-6x+31)=0

We get rid of parentheses

-2x+6x-31-21=0

We add all the numbers together, and all the variables

4x-52=0

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

4x=52

x=52/4

x=13

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