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 add all the numbers together, and all the variables

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-6=0

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

-n=6

n=6/-1

n=-6

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