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D( x )
x = 0
8*x+3 = 0
x = 0
x = 0
8*x+3 = 0
8*x+3 = 0
8*x+3 = 0 // - 3
8*x = -3 // : 8
x = -3/8
x in (-oo:-3/8) U (-3/8:0) U (0:+oo)
(16*x-7)/(8*x+3) = 2-(6/x) // - 2-(6/x)
(16*x-7)/(8*x+3)+6/x-2 = 0
(x*(16*x-7))/(x*(8*x+3))+(6*(8*x+3))/(x*(8*x+3))+(-2*x*(8*x+3))/(x*(8*x+3)) = 0
x*(16*x-7)+6*(8*x+3)-2*x*(8*x+3) = 0
16*x^2-16*x^2+41*x-6*x+18 = 0
35*x+18 = 0
(35*x+18)/(x*(8*x+3)) = 0
(35*x+18)/(x*(8*x+3)) = 0 // * x*(8*x+3)
35*x+18 = 0
35*x+18 = 0 // - 18
35*x = -18 // : 35
x = -18/35
x = -18/35
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