0.643=20/x

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Solution for 0.643=20/x equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

0.643 = 20/x // - 20/x

0.643-(20/x) = 0

0.643-20*x^-1 = 0

-20*x^-1 = -0.643 // : -20

x^-1 = 0.03215

-1 < 0

1/(x^1) = 0.03215 // * x^1

1 = 0.03215*x^1 // : 0.03215

31.10419907 = x^1

x = 31.10419907

x = 31.10419907

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