18=x+(12+18)

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Solution for 18=x+(12+18) equation: 



18=x+(12+18)

We move all terms to the left:

18-(x+(12+18))=0

We add all the numbers together, and all the variables

-(x+30)+18=0

We get rid of parentheses

-x-30+18=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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