12/14=9/x

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Solution for 12/14=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

12/14 = 9/x // - 9/x

12/14-(9/x) = 0

12/14-9*x^-1 = 0

-9*x^-1 = -6/7 // : -9

x^-1 = 2/21

-1 < 0

1/(x^1) = 2/21 // * x^1

1 = 2/21*x^1 // : 2/21

21/2 = x^1

x = 21/2

x = 21/2

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