-3=x-(-12)

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



-3=x-(-12)

We move all terms to the left:

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



We calculate terms in parentheses: -(x-(-12)), so:

x-(-12)

We add all the numbers together, and all the variables

x+12

Back to the equation:

-(x+12)



We get rid of parentheses

-x-12-3=0

We add all the numbers together, and all the variables

-1x-15=0

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

-x=15

x=15/-1

x=-15

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