若变量x y满足约束条件{x+y
已知变量x,y满足约束条件1
若变量x,y满足约束条件{x>=-1;y>=x;3x+2y
已知变量x,y满足约束条件{x+y
若变量x,y满足约束条件x+y≤2x≥1y≥0
若变量x,y满足约束条件x≥−1y≥xx+y≤1
设变量x,y满足约束条件x-y>-1,x+y>1,3x-y
已知变量xy满足约束条件x+2y-3
若变量x,y满足约束条件3≤2x+y≤96≤x−y≤9
设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2
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
若变量x,y满足约束条件-1≤x:x≤y;3x+2y≤5,则z=2x+y的最大值为