-(x-3)=15

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Solution for -(x-3)=15 equation: 



-(x-3)=15

We move all terms to the left:

-(x-3)-(15)=0

We get rid of parentheses

-x+3-15=0

We add all the numbers together, and all the variables

-1x-12=0

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

-x=12

x=12/-1

x=-12

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