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17.6=6.28r
We move all terms to the left:
17.6-(6.28r)=0
We add all the numbers together, and all the variables
-(+6.28r)+17.6=0
We get rid of parentheses
-6.28r+17.6=0
We move all terms containing r to the left, all other terms to the right
-6.28r=-17.6
r=-17.6/-6.28
r=2+4.8461538461538/6.0384615384615
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