6-12x<0
    2(6-x)>3(x-1) (x/3) - 0.5(x-2) ≤1
    2(6-x)>3(x-1) x/3 - (x-2)2 ≤1
    2(6-x)>3(x-1)
    5x+5＞4x-2
    x+6≥3x+4
    2x-1≥3（x-1）
    x＜2x+1
    x-3＞0
    x+1＞0
    x≥-1
    x-（x+3）/1＜0
    -2x+6≥10
    3/1（x+3）+2≥1
    3x+5＜4
    0.27+0.12x>=0
    0.27+0.12x<=20
    15.35+x<=25
    15.35+x>=0
    20.11-0.16x>=0

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