若不等式组x≥0y≥0y+x≤sy+2x≤4
若不等式组x≥0y≥0y+x≤sy+2x≤4
若实数x,y满足不等式组2x+y≤4x≥0y≥0
若实数X,Y满足不等式组y≤2,x-y≥0,x-2y≤0.则z=x+y的最大值为
求不等式组x≥0x+3y≥43x+y≤4
画出不等式组x+y-6≥0 x-y≥0 y≤3 x
若实数x,y满足不等式组x-y+1≥0x+y-1≤0y≥0
若不等式组x−y+5≥0y≥a0≤x≤2
若实数xy满足不等式组x-2y≥0,x+y-3≥0,x-y-3≤0,则2x-y的最小值为?
若实数x,y满足不等式组2x−y≥0x+y−3≥03x+y−8≤0
若实数x、y满足不等式组x+y≥22x−y≤4x−y≥0
不等式组x−y≥−2x+y≤3x≥0y≥0
若实数x,y满足不等式组x+y≥2①;2x-y≤4②;x-y≥0③,则2x+3y的最小值是