-20+11r=8r+13

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Solution for -20+11r=8r+13 equation: 



-20+11r=8r+13

We move all terms to the left:

-20+11r-(8r+13)=0

We get rid of parentheses

11r-8r-13-20=0

We add all the numbers together, and all the variables

3r-33=0

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

3r=33

r=33/3

r=11

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