13=9r/9+8

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Solution for 13=9r/9+8 equation: 



13=9r/9+8

We move all terms to the left:

13-(9r/9+8)=0

We get rid of parentheses

-9r/9-8+13=0

We multiply all the terms by the denominator


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

We add all the numbers together, and all the variables

-9r+45=0

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

-9r=-45

r=-45/-9

r=+5

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