2.31X^2-0.538X+0.0231<0
    1+x＞-1
    1000(x/10)*50>=34000
    1000(x/10)>=34000
    1000((x/10)*50-40)>=34000
    4*((5000-x)/150)
    10000-50a<75a<75(200-a)
    (-16x/(4xx+25)+56x/(49xx+36))^2+(2+(16xx/60)/(4xx+25)+(196xx+96)/(49xx+36))^2-2(10+(80xx+300)/(4xx+25)+(980xx+480)/(49xx+36))＜0
    a+2a+2>30-a-2a-2 30-a-2a-2+a>2a+2 30-a-2a-2+2a+2>a
    【（225 -x- 150）/150】×100%大于等于10%
    3x+240<2.4x+306
    3x+240>2.4x+306
    (m+2)/3>(2m-2)/3
    X/2+1 ≥x/3
    20000*x＞（60+25+15）*10000+10000*x
    （60+25+15）*10000+10000*x＜2600000
    3x-2<10-x
    3x-3<10-x
    4x-3<3+6x
    4x-4-6x-12>-12

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