20/z=5

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Solution for 20/z=5 equation: 


D( z )

z = 0

z = 0

z = 0

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

20/z = 5 // - 5

20/z-5 = 0

20*z^-1 = 5 // : 20

z^-1 = 1/4

-1 < 0

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

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

4 = z^1

z = 4

z = 4

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