28=2*3.14*r

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Solution for 28=2*3.14*r equation: 



28=2*3.14r

We move all terms to the left:

28-(2*3.14r)=0

We add all the numbers together, and all the variables

-(+2*3.14r)+28=0

We get rid of parentheses

-2*3.14r+28=0

Wy multiply elements

-6r+28=0

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

-6r=-28

r=-28/-6

r=4+2/3

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