7-2/x=9

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Solution for 7-2/x=9 equation: 


D( x )

x = 0

x = 0

x = 0

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

7-(2/x) = 9 // - 9

7-(2/x)-9 = 0

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

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

x^-1 = -1

-1 < 0

1/(x^1) = -1 // * x^1

1 = -1*x^1 // : -1

-1 = x^1

x = -1

x = -1

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