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