1<-x+4
    574.9*x/(950000+x)*5-x*0.003 >0.05
    574*x/(950000+x)*5-x*0.003 >0.05
    575*x/(950000+x)*5-x*0.003 >0.05
    576*x/(950000+x)*5-x*0.003 >0.05
    571*x/(950000+x)*5-x*0.003 >0.05
    1-（0.264k+0.368)^2>(0.632-0.264k)(0.368k-1.368)
    x-x*0.1/4>10
    4.9*(x+1) <4+5x
    4.9*(x+1) <2*1+5x
    4.9*(x+1) < 1+ 5x
    570*x/(935641+x)*5-x*0.003 >0.05
    570*x/(950000+x)*5-x*0.003 >0.05
    22＜11x
    （2x+1）/（1-x）＜5
    -1＜（9a+13）/5≤8
    -1＜9a+13/5≤8
    -15≤4x+1≤21
    5(x-2)+8<6(x-1)+7
    80x+50(50-x)≤3000

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