Six years ago, A's age was half of what his age will be six years from now. What is A's present age?
18 years
Let A's present age be x years. Six years ago his age was (x − 6); six years from now it will be (x + 6).
Given x − 6 = \(\frac{x + 6}{2}\), so 2x − 12 = x + 6.
x = 18.
Hence, the answer is 18 years.
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