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x in (-oo:+oo)
33 > 5*x-(12/1) // - 5*x-(12/1)
12/1-(5*x)+33 > 0
12-5*x+33 > 0
45-5*x > 0 // - 45
-5*x > -45 // : -5
x < -45/(-5)
x < 9
x in (-oo:9)
(-oo:9)
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