25=2*r

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Solution for 25=2*r equation: 



25=2*r

We move all terms to the left:

25-(2*r)=0

We add all the numbers together, and all the variables

-(+2r)+25=0

We get rid of parentheses

-2r+25=0

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

-2r=-25

r=-25/-2

r=12+1/2

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