13=r/13

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Solution for 13=r/13 equation: 



13=r/13

We move all terms to the left:

13-(r/13)=0

We add all the numbers together, and all the variables

-(+r/13)+13=0

We get rid of parentheses

-r/13+13=0

We multiply all the terms by the denominator


-r+13*13=0

We add all the numbers together, and all the variables

-1r+169=0

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

-r=-169

r=-169/-1

r=+169

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