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6=2*3.14r
We move all terms to the left:
6-(2*3.14r)=0
We add all the numbers together, and all the variables
-(+2*3.14r)+6=0
We get rid of parentheses
-2*3.14r+6=0
Wy multiply elements
-6r+6=0
We move all terms containing r to the left, all other terms to the right
-6r=-6
r=-6/-6
r=1
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