18-3=(12+x)

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Solution for 18-3=(12+x) equation: 



18-3=(12+x)

We move all terms to the left:

18-3-((12+x))=0

We add all the numbers together, and all the variables

-((x+12))+18-3=0

We add all the numbers together, and all the variables

-((x+12))+15=0



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

(x+12)

We get rid of parentheses

x+12

Back to the equation:

-(x+12)



We get rid of parentheses

-x-12+15=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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