9r-20=18+11r

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Solution for 9r-20=18+11r equation: 



9r-20=18+11r

We move all terms to the left:

9r-20-(18+11r)=0

We add all the numbers together, and all the variables

9r-(11r+18)-20=0

We get rid of parentheses

9r-11r-18-20=0

We add all the numbers together, and all the variables

-2r-38=0

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

-2r=38

r=38/-2

r=-19

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