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x in (-oo:+oo)
1/4 < 1/16-((1/2)*x) // - 1/16-((1/2)*x)
(1/2)*x+1/4-(1/16) < 0
(1/2)*x+1/4-1/16 < 0
1/2*x+3/16 < 0 // - 3/16
1/2*x < -3/16 // : 1/2
x < -3/16/1/2
x < -3/8
x in (-oo:-3/8)
(-oo:-3/8)
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