把几句简单的英语翻译成汉语，急需

设我现在为X岁,有(X+2)=5×4=20,得X=18岁,
在设到那时我为Y岁,那么弟弟就Y/2岁,18-Y=5-Y/2,得Y=26岁

原文：In two years i will be four times older than my brother is now,my brother is 5 now.HOW old will i be when i am twice as old as my brother?
修改后：I will be four times elder than my little brother in the next two years.my little brother is five years old.How old will I when I am twice as old as my brother?

2年后，我将比我弟弟大4岁，我弟弟现在5岁了，那么2倍大于我弟弟时我将会是多大呢？（5＋2＋4）×2＝22

答案同上.
里面很多倍数比较的语法
如基数词数量+time(s)+ad.比较级+than=序数词数量+as+ad.+as
eg:four times older than=fourth as old as 四倍大

上面的回答就不错啊

In two years i will be four times older than my brother is now,my brother is 5 now.HOW old will i be when i am twice as old as my brother?
2年后我的岁数就是我弟弟现在岁数的5倍(比他大4倍),我弟弟现在5岁.当我的岁数是我弟弟两倍的时候我几岁?
弟弟现在5岁,我2年后比他现在大4倍,我2年后就是25岁.我现在就是23岁.当我几岁时是他两倍?
23+X=2(5+X) X=13,我的岁数就是23+13=36