4r+20=-72

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Solution for 4r+20=-72 equation: 



4r+20=-72

We move all terms to the left:

4r+20-(-72)=0

We add all the numbers together, and all the variables

4r+92=0

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

4r=-92

r=-92/4

r=-23

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