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56.52=2*3.14r
We move all terms to the left:
56.52-(2*3.14r)=0
We add all the numbers together, and all the variables
-(+2*3.14r)+56.52=0
We get rid of parentheses
-2*3.14r+56.52=0
Wy multiply elements
-6r+56.52=0
We move all terms containing r to the left, all other terms to the right
-6r=-56.52
r=-56.52/-6
r=9+1/2.38095238095
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