6x≤-2
    240a+200（20－a）≥4500
    500*1/4(120-x)+1000x/6≦18200
    x+2/3-x-1/2≤2
    5+3x<13
    -3<=(2x-1)/3 (2x-1)/3<7 -1<=3(1+3x)/5 3(1+3x)/5<=6
    3(x-1)+13>5x-2(5-x) 5-(2x+1)<3-6x x-3(x-2)>=4 (1+2x)/3>x-1 x-3(x-2)>=4 (2x-1)/5>(x+1)/2
    40x+32（5-x）≥173 500x+300（5-x）≤2300
    40x+32（5-x）≥173
    1-10*h+50*(h^2)-500/3*(h^3)+1250/3*(h^4)>-1
    1-10*h+50*(h^2)-500/3*(h^3)+1250/3*(h^4)<1
    ln（3+x）≥0
    －2x^2＋136x＋1450＞0
    －2x＋136x＋1450＞0
    （3-x）÷4-1<（3x-1）÷4
    5-(2x+3)/2≤x/6
    5-x+（3/2）≤x/6
    -11200+x-x*10%/4>100
    99≤7.5x+6(15-x)
    3x-11≤0

Home page << page562 page563 page564 page565 page566 ... ... page577page page578page page579page page580page page581page >> Last page 1275 pages in total