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D( x )
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x in (-oo:1/2) U (1/2:+oo)
3/(2*x-1)+4 = (6*x)/(2*x-1) // - (6*x)/(2*x-1)
3/(2*x-1)-((6*x)/(2*x-1))+4 = 0
3/(2*x-1)-6*x*(2*x-1)^-1+4 = 0
3/(2*x-1)+(-6*x)/(2*x-1)+4 = 0
3/(2*x-1)+(-6*x)/(2*x-1)+(4*(2*x-1))/(2*x-1) = 0
4*(2*x-1)-6*x+3 = 0
8*x-6*x-4+3 = 0
2*x-1 = 0
(2*x-1)/(2*x-1) = 0
(2*x-1)/(2*x-1) = 0 // * 2*x-1
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x in { 1/2}
x belongs to the empty set
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