81=9-3(-5+4n)

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Solution for 81=9-3(-5+4n) equation: 



81=9-3(-5+4n)

We move all terms to the left:

81-(9-3(-5+4n))=0

We add all the numbers together, and all the variables

-(9-3(4n-5))+81=0



We calculate terms in parentheses: -(9-3(4n-5)), so:

9-3(4n-5)

determiningTheFunctionDomain
-3(4n-5)+9

We multiply parentheses

-12n+15+9

We add all the numbers together, and all the variables

-12n+24

Back to the equation:

-(-12n+24)



We get rid of parentheses

12n-24+81=0

We add all the numbers together, and all the variables

12n+57=0

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

12n=-57

n=-57/12

n=-4+3/4

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