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20=2*3.1415926536x
We move all terms to the left:
20-(2*3.1415926536x)=0
We add all the numbers together, and all the variables
-(+2*3.1415926536x)+20=0
We get rid of parentheses
-2*3.1415926536x+20=0
Wy multiply elements
-6x+20=0
We move all terms containing x to the left, all other terms to the right
-6x=-20
x=-20/-6
x=3+1/3
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