7/z=84/12

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Solution for 7/z=84/12 equation: 


D( z )

z = 0

z = 0

z = 0

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

7/z = 84/12 // - 84/12

7/z-(84/12) = 0

7/z-7 = 0

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

z^-1 = 1

-1 < 0

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

1 = 1*z^1 // : 1

1 = z^1

z = 1

z = 1

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