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59.7=2*3.14r
We move all terms to the left:
59.7-(2*3.14r)=0
We add all the numbers together, and all the variables
-(+2*3.14r)+59.7=0
We get rid of parentheses
-2*3.14r+59.7=0
Wy multiply elements
-6r+59.7=0
We move all terms containing r to the left, all other terms to the right
-6r=-59.7
r=-59.7/-6
r=9+3.3529411764706/3.5294117647059
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