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3850=3.14r
We move all terms to the left:
3850-(3.14r)=0
We add all the numbers together, and all the variables
-(+3.14r)+3850=0
We get rid of parentheses
-3.14r+3850=0
We move all terms containing r to the left, all other terms to the right
-3.14r=-3850
r=-3850/-3.14
r=1226+0.35999999999967/3.14
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