问答题A man is 48 years old. He asks the other man how old he is. The other man answers: “I am twice as old as you were when I was as old as you are today.” How old is the other man?

问答题
A man is 48 years old. He asks the other man how old he is. The other man answers: “I am twice as old as you were when I was as old as you are today.” How old is the other man?

参考解析

解析: A现在48岁,B48岁时,年龄是A当时年龄的两倍,假设B年龄为X,由题意可知X=2[48-(X-48)],由此得出X=64,即B现在64岁。

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