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x in (-oo:+oo)
3-((4*x)/6) > x // - x
3-((4*x)/6)-x > 0
(-2/3)*x-x+3 > 0
3-5/3*x > 0 // - 3
-5/3*x > -3 // : -5/3
x < -3/(-5/3)
x < 9/5
x in (-oo:9/5)
(-oo:9/5)
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