3/9=12/z

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Solution for 3/9=12/z equation: 


D( z )

z = 0

z = 0

z = 0

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

3/9 = 12/z // - 12/z

3/9-(12/z) = 0

3/9-12*z^-1 = 0

-12*z^-1 = -1/3 // : -12

z^-1 = 1/36

-1 < 0

1/(z^1) = 1/36 // * z^1

1 = 1/36*z^1 // : 1/36

36 = z^1

z = 36

z = 36

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