13=r/9+

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Solution for 13=r/9+ equation: 



13=r/9+

We move all terms to the left:

13-(r/9+)=0

We add all the numbers together, and all the variables

-(+r/9)+13=0

We get rid of parentheses

-r/9+13=0

We multiply all the terms by the denominator


-r+13*9=0

We add all the numbers together, and all the variables

-1r+117=0

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

-r=-117

r=-117/-1

r=+117

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