4/z-9=-2

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Solution for 4/z-9=-2 equation: 


D( z )

z = 0

z = 0

z = 0

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

4/z-9 = -2 // + 2

4/z-9+2 = 0

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

z^-1 = 7/4

-1 < 0

1/(z^1) = 7/4 // * z^1

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

4/7 = z^1

z = 4/7

z = 4/7

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