7,850=2(3.14)r

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Solution for 7,850=2(3.14)r equation: 



7.850=2(3.14)r

We move all terms to the left:

7.850-(2(3.14)r)=0

We add all the numbers together, and all the variables

-(2(3.14)r)+7.85=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)+7.85=0

We get rid of parentheses

-6.28r+7.85=0

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

-6.28r=-7.85

r=-7.85/-6.28

r=1+1/4

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