7/9=2/x

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Solution for 7/9=2/x equation: 


D( x )

x = 0

x = 0

x = 0

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

7/9 = 2/x // - 2/x

7/9-(2/x) = 0

7/9-2*x^-1 = 0

-2*x^-1 = -7/9 // : -2

x^-1 = 7/18

-1 < 0

1/(x^1) = 7/18 // * x^1

1 = 7/18*x^1 // : 7/18

18/7 = x^1

x = 18/7

x = 18/7

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