5r+20=80

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Solution for 5r+20=80 equation: 



5r+20=80

We move all terms to the left:

5r+20-(80)=0

We add all the numbers together, and all the variables

5r-60=0

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

5r=60

r=60/5

r=12

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