问题描述：
My brother is two years younger than I.My sister is four years younger than my brother.My mother wa
My brother is two years younger than I.My sister is four years younger than my brother.My mother was 20 years old when I was born. In this year the average age of our four is 38.Can you tell me how old each of us four is?
My brother is two years younger than I.My sister is four years younger than my brother.My mother was 20 years old when I was born. In this year the average age of our four is 38.Can you tell me how old each of us four is?
问题解答：
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