3=(n-9)

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Solution for 3=(n-9) equation: 



3=(n-9)

We move all terms to the left:

3-((n-9))=0



We calculate terms in parentheses: -((n-9)), so:

(n-9)

We get rid of parentheses

n-9

Back to the equation:

-(n-9)



We get rid of parentheses

-n+9+3=0

We add all the numbers together, and all the variables

-1n+12=0

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

-n=-12

n=-12/-1

n=+12

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