S=2(3.14)r

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Solution for S=2(3.14)r equation: 



=2(3.14)S

We move all terms to the left:

-(2(3.14)S)=0



We calculate terms in parentheses: -(2(3.14)S), so:

2(3.14)S

We multiply parentheses

6.28S

Back to the equation:

-(6.28S)



We add all the numbers together, and all the variables

-(+6.28S)=0

We get rid of parentheses

-6.28S=0

S=0/-6.28

S=0

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