9/z=6/7

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Solution for 9/z=6/7 equation: 


D( z )

z = 0

z = 0

z = 0

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

9/z = 6/7 // - 6/7

9/z-(6/7) = 0

9/z-6/7 = 0

9*z^-1 = 6/7 // : 9

z^-1 = 2/21

-1 < 0

1/(z^1) = 2/21 // * z^1

1 = 2/21*z^1 // : 2/21

21/2 = z^1

z = 21/2

z = 21/2

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