-9=3+6r-8r

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Solution for -9=3+6r-8r equation: 



-9=3+6r-8r

We move all terms to the left:

-9-(3+6r-8r)=0

We add all the numbers together, and all the variables

-(-2r+3)-9=0

We get rid of parentheses

2r-3-9=0

We add all the numbers together, and all the variables

2r-12=0

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

2r=12

r=12/2

r=6

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