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Noah and Emzara had three children : Ham, Japheth and Shem.
The difference between the parents' ages was the same as between Ham and Japheth
and between Japheth and Shem.

Multiplying Ham and Japheth 's ages equalled Noah's age.
Multiplying Japheth and Shem's ages equalled Emzara's age.
The combined ages of all five people amounted to ninety years.

Question: How old is each person?

See answer

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