5/7.5=7/z

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Solution for 5/7.5=7/z equation: 


D( z )

z = 0

z = 0

z = 0

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

5/7.5 = 7/z // - 7/z

5/7.5-(7/z) = 0

5/7.5-7*z^-1 = 0

-7*z^-1 = -0.66666667 // : -7

z^-1 = 0.0952381

-1 < 0

1/(z^1) = 0.0952381 // * z^1

1 = 0.0952381*z^1 // : 0.0952381

10.49999948 = z^1

z = 10.49999948

z = 10.49999948

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