已知实数X,Y满足 X+Y-3≥0

已知实数x，y满足x−y+5≥0x≤3x+y≥0 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 已知实数x，y满足2x+y−2≥0x−2y+4≥03x−y−3≤0则x 已知实数x,y满足条件{2x-y+1≥0,2x+y≥0,x≤1,求z=x+3y的最小值. 若实数x、y，满足x≥0y≥04x+3y≤12 已知实数x,y满足不等式组Y≤X,X+Y≤2,Y≥0,那么目标函数Z=+3Y的最大值是? 已知实数x，y满足条件2x+y≥3x+y−3≤0x≥0y≥0 已知实数x，y满足2x+y−2≥0x−2y+4≥03x−y−3≤0 已知实数想x.y满足x²+3x+y-3=0 则x+y的最大值为 已知实数x、y满足2x2-7xy+3y2=0,求x：y 已知实数x,y 满足x2+y2+2x-2√3y=0求： 已知实数x,y满足x-y大于等于0,x+y-1小于等于0