3x＋5 ≥－1
    3x＋5＞2
    2 ( x－3 )＋5＜5x
    x-5/2<2x-1/3
    241.26*1000000≤22.4*2220*X*（1490-X/2）
    3146.44×10^6≤23.1×1800x×(1950-x/2)
    910.92×10^6≤23.1×1800x×(1950-x/2)
    1904.21×10^6≤23.1×1800x×(1950-x/2)
    4215.35×10^6≤23.1×1800x×(1950-x/2)
    4215.35×10^6≤13.8×1800x×(1950-x/2)
    3+X>5
    1944.84×〖10〗^6≤23.1×1200×x(1050-x/2)
    (a-6)^2＞0
    x×0.92-x×0.5>57
    -2x≤-4
    x*92％-x*50％≥44.4
    1+x-e^x＜0
    5 ( 3x－2 )＞9x＋2
    1/4x+1≤1/3x+1/5
    1/4x-5/2≤-1/6x

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