8r+20=4

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Solution for 8r+20=4 equation: 



8r+20=4

We move all terms to the left:

8r+20-(4)=0

We add all the numbers together, and all the variables

8r+16=0

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

8r=-16

r=-16/8

r=-2

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