-3+(-x)+12=-12+2x

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Solution for -3+(-x)+12=-12+2x equation: 



-3+(-x)+12=-12+2x

We move all terms to the left:

-3+(-x)+12-(-12+2x)=0

We add all the numbers together, and all the variables

(-1x)-(2x-12)-3+12=0

We add all the numbers together, and all the variables

(-1x)-(2x-12)+9=0

We get rid of parentheses

-1x-2x+12+9=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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