9r-9r+9=-1-r

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



9r-9r+9=-1-r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

1r+1+9=0

We add all the numbers together, and all the variables

r+10=0

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

r=-10

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