x=(2*3.14*r/2)*1/2r

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Solution for x=(2*3.14*r/2)*1/2r equation: 


x in (-oo:+oo)

x = ((1*((2*3.14*r)/2))/2)*r // - ((1*((2*3.14*r)/2))/2)*r

x-(((1*((2*3.14*r)/2))/2)*r) = 0

x-1.57*r^2 = 0

x-1.57*r^2 = 0 // + -1.57*r^2

x = -(-1.57*r^2)

x = 1.57*r^2

x = 1.57*r^2

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