20=9/x

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Solution for 20=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20 = 9/x // - 9/x

20-(9/x) = 0

20-9*x^-1 = 0

-9*x^-1 = -20 // : -9

x^-1 = 20/9

-1 < 0

1/(x^1) = 20/9 // * x^1

1 = 20/9*x^1 // : 20/9

9/20 = x^1

x = 9/20

x = 9/20

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