-(x-12)=30

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Solution for -(x-12)=30 equation: 



-(x-12)=30

We move all terms to the left:

-(x-12)-(30)=0

We get rid of parentheses

-x+12-30=0

We add all the numbers together, and all the variables

-1x-18=0

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

-x=18

x=18/-1

x=-18

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