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D( x )
4.6*x+3 <= 0
4.6*x+3 <= 0
4.6*x+3 <= 0
4.6*x+3 <= 0 // - 3
4.6*x <= -3 // : 4.6
x <= -3/4.6
x <= -0.65217391
x in (-0.65217391:+oo)
19/23 = ln(4.6*x+3) // - ln(4.6*x+3)
19/23-ln(4.6*x+3) = 0
19/23-ln(4.6*x+3) = 0 // - 19/23
-ln(4.6*x+3) = -19/23
-ln(4.6*x+3) = -19/23 // * -1
ln(4.6*x+3) = ln(e^(19/23))
4.6*x+3 = e^(19/23)
4.6*x-e^(19/23)+3 = 0 // - 3-e^(19/23)
4.6*x = -(3-e^(19/23)) // : 4.6
x = (-(3-e^(19/23)))/4.6
x = 0.2173913*(e^(19/23)-3)
x = 0.2173913*(e^(19/23)-3)
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