20=-8-2r

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Solution for 20=-8-2r equation: 



20=-8-2r

We move all terms to the left:

20-(-8-2r)=0

We add all the numbers together, and all the variables

-(-2r-8)+20=0

We get rid of parentheses

2r+8+20=0

We add all the numbers together, and all the variables

2r+28=0

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

2r=-28

r=-28/2

r=-14

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