已知x，y满足x−1≥0x−y−1≤02x+y−5≤0

已知x，y满足约束条件x−y+5≥0x+y≥0x≤3 已知实数x，y满足x−y+5≥0x≤3x+y≥0 设变量x，y满足约束条件x−y≥0x+y≤1x+2y≥1 （2012•浙江模拟）已知实数x，y满足约束条件2x−y≤0x−3y+5≥0y≥1 已知x，y满足约束条件x−y+5≥0x+y≥0x≤3，则z=x+2y的最小值为（　　） 已知实数x，y满足y≤1y≥|x−1| 已知实数x，y满足约束条件x−y≤12x+y≤4x≥1 若实数x，y满足x−y+1≥0x+y≥0x≤0 若实数x，y满足x≥1x+y≤4x−2y+c≤0 （2012•道里区三模）已知x，y满足条件x≥0x−y+2≥02x+y−5≤0 已知实数x，y满足2x+y−2≥0x−2y+4≥03x−y−3≤0则x 已知x、y满足x+3y−3≤0x≥0y≥0