实数x,y满足2x+y-4≤0,x-y+2≥0,x≥0,y≥0,则点P（x,y）到直线 ax-y-4a+3=0的距离的最大值是

实数x,y满足条件x+y-4≤0,x-2y+2≥0,x≥0,y≥0,则x-y的最小值为 若实数x,y满足不等式组｛x+y≥2 ｛2x-y≤4 ｛x-y≥0 ,则2x+3y的最小值是? 设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y 设实数x,y 满足x²+4y²+2x-4y+2+0 则x+y= 已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是 若实数x,y满足x²+y²-2x+4y=0,求x-y的最大值 一直实数X,Y满足{Y≤2X,Y≤4,X-2Y+3≤0}则X+Y-8的最大值为__ 设实数x,y满足x-y-2≥0,x+2y-4≥0,2y-3≤0(1)2x+y的最小值为 已知实数x,y满足条件 y≤0,y≥x,2x+y+4≥0,则z=x+3y的最小值是 实数x,y满足约束条件.求范围实数x,y满足约束条件x-y+2>=0 x+y-4>0x 设实数x,y满足 x>=0 x-2y>=0 x-y-2 当实数x,y,满足约束条件{x>0 y>=x 2x+y+k 已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 实数x,y满足:｜x+y｜ 若实数x,y满足x-4y+3≤0,3x+5y-25≤0,x≥1,则2x-y的最大值是多少 已知实数x,y满足不等式2x-y>=0,x+y-4>=0,x 已知实数x,y满足不等式2x-y>=0,x+y-4>=0,x