339.6224=3.14*r*r

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Solution for 339.6224=3.14*r*r equation: 



339.6224=3.14r*r

We move all terms to the left:

339.6224-(3.14r*r)=0

We add all the numbers together, and all the variables

-(+3.14r*r)+339.6224=0

We get rid of parentheses

-3.14r*r+339.6224=0

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

-3.14r*r=-339.6224

r=-339.6224/1

r=-339.6224

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