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x in (-oo:+oo)
(1/3)*x-2 < (2/3)*x-6 // - (2/3)*x-6
(1/3)*x-((2/3)*x)-2+6 < 0
(1/3)*x+(-2/3)*x-2+6 < 0
4-1/3*x < 0 // - 4
-1/3*x < -4 // : -1/3
x > -4/(-1/3)
x > 12
x in (12:+oo)
(12:+oo)
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