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x in (-oo:+oo)
(1/2)*(8*x-2) = 4*x-1 // - 4*x-1
(1/2)*(8*x-2)-(4*x)+1 = 0
(1/2)*(8*x-2)-4*x+1 = 0
1/2*(8*x-2)-4*x+1 = 0
1/2*(8*x-2)-4*x+1 = 0
1-1 = 0
0 = 0
0 = 0
x belongs to the empty set
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