-20-3r-20=20+9r

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Solution for -20-3r-20=20+9r equation: 



-20-3r-20=20+9r

We move all terms to the left:

-20-3r-20-(20+9r)=0

We add all the numbers together, and all the variables

-3r-(9r+20)-20-20=0

We add all the numbers together, and all the variables

-3r-(9r+20)-40=0

We get rid of parentheses

-3r-9r-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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