设变量x,y满足①x-y≤10,②0≤x+y≤20,③0≤y≤15,求2x+3y的最大值,

问题描述:

设变量x,y满足①x-y≤10,②0≤x+y≤20,③0≤y≤15,求2x+3y的最大值,

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