-13=r/9+9

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



-13=r/9+9

We move all terms to the left:

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

We get rid of parentheses

-r/9-9-13=0

We multiply all the terms by the denominator


-r-9*9-13*9=0

We add all the numbers together, and all the variables

-1r-198=0

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

-r=198

r=198/-1

r=-198

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