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v in (-oo:+oo)
11 > v/(-4) // - v/(-4)
11-(v/(-4)) > 0
1/4*v+11 > 0 // - 11
1/4*v > -11 // : 1/4
v > -11/1/4
v > -44
v in (-44:+oo)
(-44:+oo)
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