Question
The age of Peter is 35 of Zeph's age. 15 years later, the ratio of Peter's age to Zeph's age is 3 : 4. How old is Zeph at first?
2 m

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The age of Peter is 35 of Zeph's age. 15 years later, the ratio of Peter's age to Zeph's age is 3 : 4. How old is Zeph at first?