The present ages of A and B are in the ratio 3:5. Eight years from now, their ages will be in the ratio 5:7. Find the present age of A (answer in years).

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Accepted Answer

12. Let ages be 3x and 5x. Then (3x+8)/(5x+8) = 5/7, so 7(3x+8) = 5(5x+8) → 21x+56 = 25x+40 → 4x = 16 → x = 4. A = 3x = 12 years.

The present ages of A and B are in the ratio 3:5. Eight years from now, their ages will be in the ratio 5:7. Find the present age of A (answer in years).

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