800x<=1000(15-2x)
    1000(15-2x)+(800+500)x<=12000
    6((2/3)x+1)>=2x-5
    7(x-1) <4x+3
    5(x-2)-1<=4(1+x)
    x+1<=2
    4x+2/3小于x/5-8+2
    40+x≥4/3（20+x）
    5+2(x-1)>-1 ((6-5x)/2)>-x-3
    5(x-1)<-x+1 ((x+1)/3)-((3x+1)/2)<1
    3x>4x-6 ((x-2)/2)>((x+1)/5)
    800*(15-x)/2<=1000x
    1000x+800(15-x)/2+500(15-x)/2 <= 12000
    1000x+800(15-x)/2+500(15-x)/2<= 1200
    X-4X<-1-2
    1000x+800(15-x)+500(15-x)<=12000
    800(15-x)<=1000x
    1000x+800(15-x)+500(15-x)<=12000
    x/4-1＜-x-3/3
    -4(7+4x)-3≥2-(6+2x)

Home page << page544 page545 page546 page547 page548 ... ... page559page page560page page561page page562page page563page >> Last page 1276 pages in total