9=78/x

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Solution for 9=78/x equation: 


D( x )

x = 0

x = 0

x = 0

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

9 = 78/x // - 78/x

9-(78/x) = 0

9-78*x^-1 = 0

-78*x^-1 = -9 // : -78

x^-1 = 3/26

-1 < 0

1/(x^1) = 3/26 // * x^1

1 = 3/26*x^1 // : 3/26

26/3 = x^1

x = 26/3

x = 26/3

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