4/10=16/z-8

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Solution for 4/10=16/z-8 equation: 


D( z )

z = 0

z = 0

z = 0

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

4/10 = 16/z-8 // - 16/z-8

4/10-(16/z)+8 = 0

4/10-16*z^-1+8 = 0

-16*z^-1 = -42/5 // : -16

z^-1 = 21/40

-1 < 0

1/(z^1) = 21/40 // * z^1

1 = 21/40*z^1 // : 21/40

40/21 = z^1

z = 40/21

z = 40/21

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