81=3(4n+7)

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Solution for 81=3(4n+7) equation: 



81=3(4n+7)

We move all terms to the left:

81-(3(4n+7))=0



We calculate terms in parentheses: -(3(4n+7)), so:

3(4n+7)

We multiply parentheses

12n+21

Back to the equation:

-(12n+21)



We get rid of parentheses

-12n-21+81=0

We add all the numbers together, and all the variables

-12n+60=0

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

-12n=-60

n=-60/-12

n=+5

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