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x in (-oo:+oo)
x-(4*x) = (-1/2)*(6*x-4) // - (-1/2)*(6*x-4)
x-((-1/2)*(6*x-4))-(4*x) = 0
(1/2)*(6*x-4)+x-4*x = 0
1/2*(6*x-4)+x-4*x = 0
1/2*(6*x-4)+x-4*x = 0
4*x-4*x-2 = 0
-2 = 0
-2 = 0
-2 = 0
x belongs to the empty set
x belongs to the empty set
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