7/z-9=1

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Solution for 7/z-9=1 equation: 


D( z )

z = 0

z = 0

z = 0

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

7/z-9 = 1 // - 1

7/z-9-1 = 0

7*z^-1 = 10 // : 7

z^-1 = 10/7

-1 < 0

1/(z^1) = 10/7 // * z^1

1 = 10/7*z^1 // : 10/7

7/10 = z^1

z = 7/10

z = 7/10

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