Question
Shiyun is 11 years old now. She is 26 years younger than her father. In how many years' time will Shiyun's father be thrice as old as Shiyun?
4 m

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Shiyun is 11 years old now. She is 26 years younger than her father. In how many years' time will Shiyun's father be thrice as old as Shiyun?