In two years I will be four times older than my brother now.

问题描述:

In two years I will be four times older than my brother now.My brother is 5 now.
How old will be I when I am twice as my brother?
1个回答 分类:英语 2014-09-30

问题解答:

我来补答
26
两年后,我的岁数应为4*5=20岁,所以我现在18岁;
设x年后为两倍,则:
2(5+x)=18+x 解得x=8
因此,18+8=26
I will be 26 at that time.那时我26岁.
 
 
展开全文阅读
剩余:2000
上一页:pass..
下一页:复合函数求值域