7.85=3.14r

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Solution for 7.85=3.14r equation: 



7.85=3.14r

We move all terms to the left:

7.85-(3.14r)=0

We add all the numbers together, and all the variables

-(+3.14r)+7.85=0

We get rid of parentheses

-3.14r+7.85=0

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

-3.14r=-7.85

r=-7.85/-3.14

r=2+1/2

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