E=1/5(3.14)r^2x

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Solution for E=1/5(3.14)r^2x equation: 


x in (-oo:+oo)

e = 3.14*(1/5)*r^2*x // - 3.14*(1/5)*r^2*x

e-(3.14*(1/5)*r^2*x) = 0

e-0.628*r^2*x = 0

e-0.628*r^2*x = 0 // - e

-0.628*r^2*x = -e // : -0.628*r^2

x = -e/(-0.628*r^2)

x = 1.59235669*e*r^-2

x = 1.59235669*e*r^-2

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