20=(3.14)r

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Solution for 20=(3.14)r equation: 



20=(3.14)r

We move all terms to the left:

20-((3.14)r)=0



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

(3.14)r

We multiply parentheses

3.14r

Back to the equation:

-(3.14r)



We add all the numbers together, and all the variables

-(+3.14r)+20=0

We get rid of parentheses

-3.14r+20=0

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

-3.14r=-20

r=-20/-3.14

r=6+1/2.7068965517241

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