已知x.y 满足约束条件,x+y+5≧0 x-y≦0 y≦0则z=2x+4y 的最小值是

已知x,y满足约束条件x-y+5>=0 x+y>=0 X 已知X,Y满足约束条件x-y+5>=0 x+y>=0 X 已知x,y满足约束条件{x+y+5 已知变量x,y满足约束条件1 已知x,y满足约束条件1 已知实数x,y满足约束条件x+y>3,y 已知x.y 满足约束条件,x+y+5≧0 x-y≦0 y≦0则z=2x+4y 的最小值是 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 已知x,y满足约束条件x-4y 已知变量x,y满足约束条件｛x+y 已知变量x,y满足约束条件｛x+y x、y满足的约束条件0 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 已知x,y满足约束条件x+y==-1,y>=1 若0= 设X,Y满足约束条件X+Y 已知xy满足约束条件y=2 2X+y 已知x,y满足约束条件 2x+5y>=10 2x-3y>=-6 2x+y