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