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2461.76=3.14r
We move all terms to the left:
2461.76-(3.14r)=0
We add all the numbers together, and all the variables
-(+3.14r)+2461.76=0
We get rid of parentheses
-3.14r+2461.76=0
We move all terms containing r to the left, all other terms to the right
-3.14r=-2461.76
r=-2461.76/-3.14
r=+784
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