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N in (-oo:+oo)
N/(-3) > 4 // - 4
N/(-3)-4 > 0
-1/3*N-4 > 0 // + 4
-1/3*N > 4 // : -1/3
N < 4/(-1/3)
N < -12
N in (-oo:-12)
(-oo:-12)
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