20/45=11/z

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Solution for 20/45=11/z equation: 


D( z )

z = 0

z = 0

z = 0

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

20/45 = 11/z // - 11/z

20/45-(11/z) = 0

20/45-11*z^-1 = 0

-11*z^-1 = -4/9 // : -11

z^-1 = 4/99

-1 < 0

1/(z^1) = 4/99 // * z^1

1 = 4/99*z^1 // : 4/99

99/4 = z^1

z = 99/4

z = 99/4

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