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x in (-oo:+oo)
(1/4)*(8*x+16) = (1/2)*(4*x+8) // - (1/2)*(4*x+8)
(1/4)*(8*x+16)-((1/2)*(4*x+8)) = 0
(1/4)*(8*x+16)+(-1/2)*(4*x+8) = 0
1/4*(8*x+16)-1/2*(4*x+8) = 0
1/4*(8*x+16)-1/2*(4*x+8) = 0
0 = 0
0 = 0
x belongs to the empty set
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