买5条毛巾和7块香皂共付48.4元,买7条毛巾和5块香皂共付53.8元9(毛巾、香皂分别是同一品种).

问题描述:

买5条毛巾和7块香皂共付48.4元,买7条毛巾和5块香皂共付53.8元9(毛巾、香皂分别是同一品种).
1条毛巾和1块香皂的价格各是多少元?

买5条毛巾和7块香皂+买7条毛巾和5块香皂=48.4元+53.8元9列方程就这样列
5x+7y=48.4
7x+5y=53.8
x=5.6
y=2.9
1条毛巾5.6元,1块香皂2.9元 不用 xiexie8888888888888888888888888