3/(9x)+4/(81x)=-31

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Solution for 3/(9x)+4/(81x)=-31 equation: 


D( x )

9*x = 0

81*x = 0

9*x = 0

9*x = 0

9*x = 0 // : 9

x = 0

81*x = 0

81*x = 0

81*x = 0 // : 81

x = 0

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

3/(9*x)+4/(81*x) = -31 // + 31

3/(9*x)+4/(81*x)+31 = 0

31/81*x^-1 = -31 // : 31/81

x^-1 = -81

-1 < 0

1/(x^1) = -81 // * x^1

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

-1/81 = x^1

x = -1/81

x = -1/81

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