-9-9r=-1-8r

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Solution for -9-9r=-1-8r equation: 



-9-9r=-1-8r

We move all terms to the left:

-9-9r-(-1-8r)=0

We add all the numbers together, and all the variables

-9r-(-8r-1)-9=0

We get rid of parentheses

-9r+8r+1-9=0

We add all the numbers together, and all the variables

-1r-8=0

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

-r=8

r=8/-1

r=-8

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