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x in (-oo:+oo)
x/(-3) > 4/5 // - 4/5
x/(-3)-(4/5) > 0
x/(-3)-4/5 > 0
-1/3*x-4/5 > 0 // + 4/5
-1/3*x > 4/5 // : -1/3
x < 4/5/(-1/3)
x < -12/5
x in (-oo:-12/5)
(-oo:-12/5)
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