变量X,Y满足条件x+y-1≤0 x-y≤0 x≥0 则2x-y的最大值为

已知变量x,y满足条件{x 设变量x.y满足条件3x+2y 变量X,Y满足条件x+y-1≤0 x-y≤0 x≥0 则2x-y的最大值为 设变量x,y满足x+y 已知变量x,y满足条件x+2y-3=0 y-1那个最大值3a 搞不懂 变量x,y满足x-2y=0,x 已知变量X,Y满足条件X大于等于1,X-Y小于等于0,X+2Y-9小于等于0,则2X+Y的最大值 y满足条件【x-y 已知变量x,y满足x大于等于1,y 已知变量x,y满足约束条件1 设变量x,y满足约束条件x-y>-1,x+y>1,3x-y 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 设变量x,y满足约束条件 {x-y≥0,x+y≤1,x+2y≥0},则函数Z=2x+y 的最大值? 设变量x,y满足约束条件 {x-y≥0,x+y≤1,x+2y≥0},则函数Z=2x+y 的最大值? 数学不等式：变量x,y满足约束条件「x-y≥0,x+y≤0,x+2y≥1」,求z=5x+y的最大值变量x,y满足约束条件「x-y≥0,x+y≤0,x+2y≥1」,求z=5x+y的最大值,有图最好!变量x,y满足约束条件「x-y≥0,x+y≤1,x+2y≥1」， 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 变量x,y满足约束条件y≤1,x+y≥0,x-y-2≤0,则z=x-2y的最大值为多少