-4r+8=-20

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Solution for -4r+8=-20 equation: 



-4r+8=-20

We move all terms to the left:

-4r+8-(-20)=0

We add all the numbers together, and all the variables

-4r+28=0

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

-4r=-28

r=-28/-4

r=+7

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