3/7=12/z

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Solution for 3/7=12/z equation: 


D( z )

z = 0

z = 0

z = 0

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

3/7 = 12/z // - 12/z

3/7-(12/z) = 0

3/7-12*z^-1 = 0

-12*z^-1 = -3/7 // : -12

z^-1 = 1/28

-1 < 0

1/(z^1) = 1/28 // * z^1

1 = 1/28*z^1 // : 1/28

28 = z^1

z = 28

z = 28

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