20=-5r-5r

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Solution for 20=-5r-5r equation: 



20=-5r-5r

We move all terms to the left:

20-(-5r-5r)=0

We add all the numbers together, and all the variables

-(-10r)+20=0

We get rid of parentheses

10r+20=0

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

10r=-20

r=-20/10

r=-2

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