39=2(3.14)r

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Solution for 39=2(3.14)r equation: 



39=2(3.14)r

We move all terms to the left:

39-(2(3.14)r)=0



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

2(3.14)r

We multiply parentheses

6.28r

Back to the equation:

-(6.28r)



We add all the numbers together, and all the variables

-(+6.28r)+39=0

We get rid of parentheses

-6.28r+39=0

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

-6.28r=-39

r=-39/-6.28

r=6+1/4.7575757575758

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