2/3=7/z-4

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Solution for 2/3=7/z-4 equation: 


D( z )

z = 0

z = 0

z = 0

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

2/3 = 7/z-4 // - 7/z-4

2/3-(7/z)+4 = 0

2/3-7*z^-1+4 = 0

-7*z^-1 = -14/3 // : -7

z^-1 = 2/3

-1 < 0

1/(z^1) = 2/3 // * z^1

1 = 2/3*z^1 // : 2/3

3/2 = z^1

z = 3/2

z = 3/2

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