2(3.14)r=10

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Solution for 2(3.14)r=10 equation: 



2(3.14)r=10

We move all terms to the left:

2(3.14)r-(10)=0

We multiply parentheses

6.28r-10=0

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

6.28r=10

r=10/6.28

r=1+1/1.68817204301

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