-2r-9+8r=9+9r

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Solution for -2r-9+8r=9+9r equation: 



-2r-9+8r=9+9r

We move all terms to the left:

-2r-9+8r-(9+9r)=0

We add all the numbers together, and all the variables

-2r+8r-(9r+9)-9=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

6r-9r-9-9=0

We add all the numbers together, and all the variables

-3r-18=0

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

-3r=18

r=18/-3

r=-6

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