13=r/9-8

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Solution for 13=r/9-8 equation: 



13=r/9-8

We move all terms to the left:

13-(r/9-8)=0

We get rid of parentheses

-r/9+8+13=0

We multiply all the terms by the denominator


-r+8*9+13*9=0

We add all the numbers together, and all the variables

-1r+189=0

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

-r=-189

r=-189/-1

r=+189

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