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62.8=6.28r
We move all terms to the left:
62.8-(6.28r)=0
We add all the numbers together, and all the variables
-(+6.28r)+62.8=0
We get rid of parentheses
-6.28r+62.8=0
We move all terms containing r to the left, all other terms to the right
-6.28r=-62.8
r=-62.8/-6.28
r=10+-7.105427357601E-15/6.28
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