A man is 48 years old. He asks the other man how old he is. The other man answer

游客2023-10-20  30

问题 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?

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答案 64

解析 (假定我现在X岁,当我48岁时,你的年龄是Y岁。因而,X=2Y,X一48=48一Y,用这两个等式,得出X=64。)
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