81=9(s+2)

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Solution for 81=9(s+2) equation: 



81=9(s+2)

We move all terms to the left:

81-(9(s+2))=0



We calculate terms in parentheses: -(9(s+2)), so:

9(s+2)

We multiply parentheses

9s+18

Back to the equation:

-(9s+18)



We get rid of parentheses

-9s-18+81=0

We add all the numbers together, and all the variables

-9s+63=0

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

-9s=-63

s=-63/-9

s=+7

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