2x+12=39-x

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Solution for 2x+12=39-x equation: 



2x+12=39-x

We move all terms to the left:

2x+12-(39-x)=0

We add all the numbers together, and all the variables

2x-(-1x+39)+12=0

We get rid of parentheses

2x+1x-39+12=0

We add all the numbers together, and all the variables

3x-27=0

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

3x=27

x=27/3

x=9

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