若x y满足约束条件｛x-y+1>=0 x+y-3=0}则z=3x-y的最小值

已知x,y满足约束条件x+y==-1,y>=1 若0= 若x,y满足约束条件,x>=0,y>=0,x-y>=-1,3x+4y 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 若实数x,y满足约束条件x-y-2=0,2y-3 若变量x,y满足约束条件｛y=0,x-y-2 若变量x,y满足约束条件｛y=0,x-y-2 已知变量x,y满足约束条件x+2y-3=0,y-1 已知变量x,y满足约束条件x+2y-3=0,y-1 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y x、y满足的约束条件0 已知变量x,y满足约束条件1 已知x,y满足约束条件1 若变量x y 满足约束条件y=1 x+y=0 x-y-2=0 则z=2x-y的最大值是多少 设X,Y满足约束条件X+Y 已知x,y满足约束条件x-y+5>=0 x+y>=0 X