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x in (-oo:+oo)
3-(x/6) > 5 // - 5
3-(x/6)-5 > 0
-1/6*x-2 > 0 // + 2
-1/6*x > 2 // : -1/6
x < 2/(-1/6)
x < -12
x in (-oo:-12)
(-oo:-12)
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