1-m<0
     m-1<0
    1-2m<0
    28x+60(30-x)<=1480
    X+5/10-2X-7/15<1
    1*7338.21≤22.4*1000000*2.2*X*（1.88-X/2）
    x-5/3-3x+4/2≤-1
    3+5x/4＜2x+1/-3
    1-2x≤7/9+2/3x
    3x＋15＞5x－9
    5(3x－2)＞9x＋2
    x-10/2<100
    －5 ( x－3 )＞18－3x
    －3x＋4＜5x＋6
    16x－4( x－2)≤18＋6(-3x＋2)
    x ≤－2
    2x＋4≤3x－1
    4x＋5 ≤ x－3
    4－2x ≥ 5
    8 ≤ 4－2x

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