x-y+2>=0 ,x+y-4>=0 ,2x-y-5

x-y+2>=0 ,x+y-4>=0 ,2x-y-5
x-y+2>=0 ,x+y-4>=0 ,2x-y-5

x-y+2>=0 ,x+y-4>=0 ,2x-y-5
要期中考试,那你还是个中学生.第一题 中学解这个题目只能画图形来解.
首先画出坐标系,再画出x-y+2>=0 , x+y-4>=0 ,2x-y-5