3=39/x

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Solution for 3=39/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3 = 39/x // - 39/x

3-(39/x) = 0

3-39*x^-1 = 0

-39*x^-1 = -3 // : -39

x^-1 = 1/13

-1 < 0

1/(x^1) = 1/13 // * x^1

1 = 1/13*x^1 // : 1/13

13 = x^1

x = 13

x = 13

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