-20+9r=11r+20

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



-20+9r=11r+20

We move all terms to the left:

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

We get rid of parentheses

9r-11r-20-20=0

We add all the numbers together, and all the variables

-2r-40=0

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

-2r=40

r=40/-2

r=-20

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