-20=r/13

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Solution for -20=r/13 equation: 



-20=r/13

We move all terms to the left:

-20-(r/13)=0

We add all the numbers together, and all the variables

-(+r/13)-20=0

We get rid of parentheses

-r/13-20=0

We multiply all the terms by the denominator


-r-20*13=0

We add all the numbers together, and all the variables

-1r-260=0

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

-r=260

r=260/-1

r=-260

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