20-11r+20=-20-15r

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Solution for 20-11r+20=-20-15r equation: 



20-11r+20=-20-15r

We move all terms to the left:

20-11r+20-(-20-15r)=0

We add all the numbers together, and all the variables

-11r-(-15r-20)+20+20=0

We add all the numbers together, and all the variables

-11r-(-15r-20)+40=0

We get rid of parentheses

-11r+15r+20+40=0

We add all the numbers together, and all the variables

4r+60=0

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

4r=-60

r=-60/4

r=-15

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