-8=9+9r

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Solution for -8=9+9r equation: 



-8=9+9r

We move all terms to the left:

-8-(9+9r)=0

We add all the numbers together, and all the variables

-(9r+9)-8=0

We get rid of parentheses

-9r-9-8=0

We add all the numbers together, and all the variables

-9r-17=0

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

-9r=17

r=17/-9

r=-1+8/9

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