4/z=7/5

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Solution for 4/z=7/5 equation: 


D( z )

z = 0

z = 0

z = 0

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

4/z = 7/5 // - 7/5

4/z-(7/5) = 0

4/z-7/5 = 0

4*z^-1 = 7/5 // : 4

z^-1 = 7/20

-1 < 0

1/(z^1) = 7/20 // * z^1

1 = 7/20*z^1 // : 7/20

20/7 = z^1

z = 20/7

z = 20/7

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