20-2r=80

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Solution for 20-2r=80 equation:



20-2r=80
We move all terms to the left:
20-2r-(80)=0
We add all the numbers together, and all the variables
-2r-60=0
We move all terms containing r to the left, all other terms to the right
-2r=60
r=60/-2
r=-30

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