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D( x )
3*x-2 = 0
3*x-2 = 0
3*x-2 = 0
3*x-2 = 0 // + 2
3*x = 2 // : 3
x = 2/3
x in (-oo:2/3) U (2/3:+oo)
5/(3*x-2)-(1/8) = 0
5/(3*x-2)-1/8 = 0
(5*8)/(8*(3*x-2))+(-1*(3*x-2))/(8*(3*x-2)) = 0
5*8-1*(3*x-2) = 0
42-3*x = 0
(42-3*x)/(8*(3*x-2)) = 0
(42-3*x)/(8*(3*x-2)) = 0 // * 8*(3*x-2)
42-3*x = 0
42-3*x = 0 // - 42
-3*x = -42 // : -3
x = -42/(-3)
x = 14
x = 14
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