Difficulty: Easy
Correct Answer: 25 years
Explanation:
Let the present age be
x years
Translate the condition
One year from now ⇒ x + 1 Twelve years ago ⇒ x − 12 Equation: x + 1 = 2(x − 12)
Solve
x + 1 = 2x − 24 25 = x
Verification
Now: 25 ⇒ In a year: 26; 12 years ago: 13; 26 = 2 × 13 ✔
Final Answer
25 years
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