25.12=3.14*r

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Solution for 25.12=3.14*r equation: 



25.12=3.14r

We move all terms to the left:

25.12-(3.14r)=0

We add all the numbers together, and all the variables

-(+3.14r)+25.12=0

We get rid of parentheses

-3.14r+25.12=0

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

-3.14r=-25.12

r=-25.12/-3.14

r=+8

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