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x in (-oo:+oo)
(1/2)*(4*x-8) = (1/4)*(-8*x-16) // - (1/4)*(-8*x-16)
(1/2)*(4*x-8)-((1/4)*(-8*x-16)) = 0
(1/2)*(4*x-8)+(-1/4)*(-8*x-16) = 0
1/2*(4*x-8)-1/4*(-8*x-16) = 0
1/2*(4*x-8)-1/4*(-8*x-16) = 0
4*x = 0
4*x = 0
4*x = 0 // : 4
x = 0
x = 0
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