设变量x,y满足约束条件x-y≦10,0≦x+y≦20,0≦y≦15,则2x+3y的最大值为

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 设变量x,y满足约束条件x-y>-1,x+y>1,3x-y 已知变量x,y满足约束条件1 设X,Y满足约束条件X+Y 设变量x,y满足约束条件x-y≦10,0≦x+y≦20,0≦y≦15,则2x+3y的最大值为 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 若变量x y满足约束条件{x+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? 设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y 设变量x,y满足约束条件y>=0.x-y+1>=0.x+y-3 设变量满足约束条件x+y≧3,x-y≧-1,2x-y≦3,则目标函数z=2x+2y最小值 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