x+y=24
4*y-8*x=24
的x=6,y=18
分别6,18没学Y呢.只可以设X,怎么解？谢谢
8角邮票和4角邮票共24张,8角邮票比4角邮票少花2.4元,求两种邮票各买了多少张/
8角邮票和4角邮票共24张,8角邮票比4角邮票少花2.4元,求两种邮票各买了多少张/
数学人气：650 ℃时间：2020-03-18 18:53:58
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