变量x,y满足x-2y=0,x

变量x,y满足x-2y=0,x 设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2 设变量x,y满足约束条件:x-y+3>=0 x+y>=0 -2 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 已知变量x,y满足约束条件x+2y-3=0,y-1 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 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 设变量x,y满足x+y 设z=2x+y式中变量x,y同时满足x-4y 设变量x.y满足条件3x+2y 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? 已知变量x,y满足条件{x 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」， 目标函数z=2x+y,变量x满足x-4y+3 已知变量x满足约束条件1：x-y+2=1；3:x+y-7