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x in (-oo:+oo)
-x-2 < 1/2 // - 1/2
-x-(1/2)-2 < 0
-x-1/2-2 < 0
-x-5/2 < 0
-x < 5/2 // * -1
x > -5/2
x in (-5/2:+oo)
(-5/2:+oo)
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