(5)解方程组:2分之x+y+3分之x-y=6 ,4(x+y)-5(x-y)=2我知道:(x+y)/2+(x-y)/3=6.①用①×63(x+y)+2(x-y)=36即5x+y=36 后面怎么写呢?

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 16:16:32
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