81=n-3(5+4n)

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Solution for 81=n-3(5+4n) equation: 



81=n-3(5+4n)

We move all terms to the left:

81-(n-3(5+4n))=0

We add all the numbers together, and all the variables

-(n-3(4n+5))+81=0



We calculate terms in parentheses: -(n-3(4n+5)), so:

n-3(4n+5)

We multiply parentheses

n-12n-15

We add all the numbers together, and all the variables

-11n-15

Back to the equation:

-(-11n-15)



We get rid of parentheses

11n+15+81=0

We add all the numbers together, and all the variables

11n+96=0

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

11n=-96

n=-96/11

n=-8+8/11

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