7.31=2(3.14r)

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Solution for 7.31=2(3.14r) equation: 



7.31=2(3.14r)

We move all terms to the left:

7.31-(2(3.14r))=0

We add all the numbers together, and all the variables

-(2(+3.14r))+7.31=0



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

2(+3.14r)

We multiply parentheses

6r

Back to the equation:

-(6r)



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

-6r=-7.31

r=-7.31/-6

r=1+1/4.58015267176

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