81=9n+18

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Solution for 81=9n+18 equation: 



81=9n+18

We move all terms to the left:

81-(9n+18)=0

We get rid of parentheses

-9n-18+81=0

We add all the numbers together, and all the variables

-9n+63=0

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

-9n=-63

n=-63/-9

n=+7

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