-12=r/9+8

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Solution for -12=r/9+8 equation: 



-12=r/9+8

We move all terms to the left:

-12-(r/9+8)=0

We get rid of parentheses

-r/9-8-12=0

We multiply all the terms by the denominator


-r-8*9-12*9=0

We add all the numbers together, and all the variables

-1r-180=0

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

-r=180

r=180/-1

r=-180

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