81=27+3s

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Solution for 81=27+3s equation: 



81=27+3s

We move all terms to the left:

81-(27+3s)=0

We add all the numbers together, and all the variables

-(3s+27)+81=0

We get rid of parentheses

-3s-27+81=0

We add all the numbers together, and all the variables

-3s+54=0

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

-3s=-54

s=-54/-3

s=+18

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