S=(n-2)=180

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Solution for S=(n-2)=180 equation: 



=(S-2)=180

We move all terms to the left:

-((S-2))=0



We calculate terms in parentheses: -((S-2)), so:

(S-2)

We get rid of parentheses

S-2

Back to the equation:

-(S-2)



We get rid of parentheses

-S+2=0

We add all the numbers together, and all the variables

-1S+2=0

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

-S=-2

S=-2/-1

S=+2

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