2r+20=-13-r

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Solution for 2r+20=-13-r equation: 



2r+20=-13-r

We move all terms to the left:

2r+20-(-13-r)=0

We add all the numbers together, and all the variables

2r-(-1r-13)+20=0

We get rid of parentheses

2r+1r+13+20=0

We add all the numbers together, and all the variables

3r+33=0

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

3r=-33

r=-33/3

r=-11

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