2r=100/6.28

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Solution for 2r=100/6.28 equation: 



2r=100/6.28

We move all terms to the left:

2r-(100/6.28)=0

We add all the numbers together, and all the variables

2r-(+100/6.28)=0

We get rid of parentheses

2r-100/6.28=0

We multiply all the terms by the denominator


2r*6.28-100=0

Wy multiply elements

12.56r-100=0

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

12.56r=100

r=100/12.56

r=7+1/1.0397350993377

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