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x in (-oo:+oo)
2-((2*x)/4) < -4 // + 4
2-((2*x)/4)+4 < 0
(-1/2)*x+2+4 < 0
6-1/2*x < 0 // - 6
-1/2*x < -6 // : -1/2
x > -6/(-1/2)
x > 12
x in (12:+oo)
(12:+oo)
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