20-r+20=11r-20

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



20-r+20=11r-20

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1r-(11r-20)+40=0

We get rid of parentheses

-1r-11r+20+40=0

We add all the numbers together, and all the variables

-12r+60=0

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

-12r=-60

r=-60/-12

r=+5

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