7/12=10/z

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Solution for 7/12=10/z equation: 


D( z )

z = 0

z = 0

z = 0

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

7/12 = 10/z // - 10/z

7/12-(10/z) = 0

7/12-10*z^-1 = 0

-10*z^-1 = -7/12 // : -10

z^-1 = 7/120

-1 < 0

1/(z^1) = 7/120 // * z^1

1 = 7/120*z^1 // : 7/120

120/7 = z^1

z = 120/7

z = 120/7

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