12-2x+13-7+x=20

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Solution for 12-2x+13-7+x=20 equation: 



12-2x+13-7+x=20

We move all terms to the left:

12-2x+13-7+x-(20)=0

We add all the numbers together, and all the variables

-1x-2=0

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

-x=2

x=2/-1

x=-2

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