Question
Tiffany was 9 years old and her aunt was 42 years old last year. In how many years' time will Tiffany's aunt be 4 times as old as Tiffany?
4 m

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Tiffany was 9 years old and her aunt was 42 years old last year. In how many years' time will Tiffany's aunt be 4 times as old as Tiffany?