-12=-(x+3)

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



-12=-(x+3)

We move all terms to the left:

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



We calculate terms in parentheses: -(-(x+3)), so:

-(x+3)

We get rid of parentheses

-x-3

We add all the numbers together, and all the variables

-1x-3

Back to the equation:

-(-1x-3)



We get rid of parentheses

1x+3-12=0

We add all the numbers together, and all the variables

x-9=0

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

x=9

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