Mathematics, 04.04.2020 16:51 767sebmont

A father who is 42 years old has a son and a daughter. The daughter is three times as old as the son. In 10 years, the sum of all their ages will be 100 years. How old are the two siblings at present?

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A father who is 42 years old has a son and a daughter. The daughter is three times as old as the son...