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D( x )
x/12 <= 0
3*x <= 0
x/12 <= 0
x/12 <= 0
1/12*x+0 <= 0 // - 0
1/12*x <= 0 // : 1/12
x <= 0/1/12
x <= 0
3*x <= 0
3*x <= 0
3*x+0 <= 0 // - 0
3*x <= 0 // : 3
x <= 0/3
x <= 0
x in (0:+oo)
2-ln(3*x) = ln(x/12) // - ln(x/12)
2-ln(3*x)-ln(x/12) = 0
ln(1/(3*x))-ln(x/12)+2 = 0
ln((1/(3*x))/(x/12))+2 = 0
ln((1/(3*x))/(x/12))+ln(1*e^2) = 0
ln((1/(3*x))/(x/12))+2 = 0 // - 2
ln((1/(3*x))/(x/12)) = -2
ln((1/(3*x))/(x/12)) = ln(e^-2)
(1/(3*x))/(x/12) = e^-2
(1/(3*x))/(x/12)-e^-2 = 0
4*x^-2 = e^-2 // : 4
x^-2 = (e^-2)/4
-2 < 0
1/(x^2) = (e^-2)/4 // * x^2
1 = ((e^-2)/4)*x^2 // : (e^-2)/4
4*e^2 = x^2
x^2 = 4*e^2 // ^ 1/2
abs(x) = 2*e
x = 2*e or x = -(2*e)
x in { -(2*e)}
x = 2*e
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