153.86=2*3.14*r

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Solution for 153.86=2*3.14*r equation: 



153.86=2*3.14*r

We move all terms to the left:

153.86-(2*3.14*r)=0

We add all the numbers together, and all the variables

-(+2*3.14*r)+153.86=0

We get rid of parentheses

-2*3.14*r+153.86=0

Wy multiply elements

-6.28r+153.86=0

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

-6.28r=-153.86

r=-153.86/-6.28

r=24+1/2

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