1.5（100-X）≥1.65（100-X）
    0.15(30-X)≥0.11（30-X）
    36x-42(x-2)>30 36x-42(x-2)<42
    36x-42(x-1)>30 36x-42(x-1)<42
    3x+3-5(x-1)≥0
    3x+3-5(x-1)<3
    3+x>0.5x+1
    4(x-0.3)<0.5x+5.8
    2x+1>3
    -3x-1>3
    2x+3≥x+11
    x+8<4x-1
    (x－7)╱x＞0.55
    (x÷2)×0.382+x > 16000
    (x－2.4)╱x＞0.55
    0.15ln(7.825-0.17x)+0.85ln(9.825-0.03x)>2.251
    （8+0.16x)(10-0.04x)^4>e^11.29
    100<8.5x+6(15-x)≤120
    5485.44+14.33x≤2.2*(747.3+75x)+369.8+0.86*(63+5x)(105.75+9.3x)
    2519+11x^2≤2302+175x+(1111x+46.5x^2+6615)/14.1+x

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