Question
Xylia is 10 years old now. She is 30 years younger than her father. In how many years' time will Xylia's father be thrice as old as Xylia?
4 m

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Xylia is 10 years old now. She is 30 years younger than her father. In how many years' time will Xylia's father be thrice as old as Xylia?