3-81/x=12

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Solution for 3-81/x=12 equation: 


D( x )

x = 0

x = 0

x = 0

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

3-(81/x) = 12 // - 12

3-(81/x)-12 = 0

3-81*x^-1-12 = 0

-81*x^-1 = 9 // : -81

x^-1 = -1/9

-1 < 0

1/(x^1) = -1/9 // * x^1

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

-9 = x^1

x = -9

x = -9

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