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D( x )
x+30.6 = 0
x+30.6 = 0
x+30.6 = 0
x+30.6 = 0 // - 30.6
x = -30.6
x in (-oo:-30.6) U (-30.6:+oo)
0.11 = x/(x+30.6) // - x/(x+30.6)
0.11-(x/(x+30.6)) = 0
(-1*x)/(x+30.6)+0.11 = 0
(-1*x)/(x+30.6)+(0.11*(x+30.6))/(x+30.6) = 0
0.11*(x+30.6)-1*x = 0
3.366-0.89*x = 0
(3.366-0.89*x)/(x+30.6) = 0
(3.366-0.89*x)/(x+30.6) = 0 // * x+30.6
3.366-0.89*x = 0
3.366-0.89*x = 0 // - 3.366
-0.89*x = -3.366 // : -0.89
x = -3.366/(-0.89)
x = 3.78202247
x = 3.78202247
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