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D( x )
6*x-3 = 0
6*x-3 = 0
6*x-3 = 0
6*x-3 = 0 // + 3
6*x = 3 // : 6
x = 3/6
x = 1/2
x in (-oo:1/2) U (1/2:+oo)
2/(6*x-3) = 5/4 // - 5/4
2/(6*x-3)-(5/4) = 0
2/(6*x-3)-5/4 = 0
(2*4)/(4*(6*x-3))+(-5*(6*x-3))/(4*(6*x-3)) = 0
2*4-5*(6*x-3) = 0
23-30*x = 0
(23-30*x)/(4*(6*x-3)) = 0
(23-30*x)/(4*(6*x-3)) = 0 // * 4*(6*x-3)
23-30*x = 0
23-30*x = 0 // - 23
-30*x = -23 // : -30
x = -23/(-30)
x = 23/30
x = 23/30
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