18/57=12/z

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Solution for 18/57=12/z equation: 


D( z )

z = 0

z = 0

z = 0

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

18/57 = 12/z // - 12/z

18/57-(12/z) = 0

18/57-12*z^-1 = 0

-12*z^-1 = -6/19 // : -12

z^-1 = 1/38

-1 < 0

1/(z^1) = 1/38 // * z^1

1 = 1/38*z^1 // : 1/38

38 = z^1

z = 38

z = 38

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