英语数学题Mrs.Jones sold two houses for $80000 each.One house was

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英语数学题
Mrs.Jones sold two houses for $80000 each.One house was sold at a 20 percent loss and the other at a 20 percent gain.
问the gain minus the loss为什么不等于零

两个房子都是以80000美元卖出的,
其中一个是涨了20%后为80000,那么原价就是66666.67
另一个是降了20%后为80000,那么原价就是100000
（80000-66666.67）-（100000-80000）你说等于零吗

Mrs.Jones sold two houses for $80,000each.One house was sold 英语阅读理解Mrs Jones was a teacher.Her house was not far from her 英语翻译Mrs Jones was a teacher ,her house was not far from her 查找一篇段文；Mrs Jones was a teacher,her house was not far from he 缺词填空Mrs Jones was a teacher,her house was not far from hersc 一篇完形填空Mrs Jones was still cleaning the house when her husban Mrs.Jones was still cleaning the house when her husband came 如何理解:So,the score was two goals each for China and Italy,one One day Mrs jones goes shopping alone One day Mrs Jones goes shopping alone. Mrs.Jones had had ____ little education that it was hard for The house was sold for RMB600,000,which was far more than re