Father's age is three times the age of his son. Five years ago, the sum of their ages was 70 years. What is the present age of the father?

Let the son's present age be y, so the father's present age is 3y. Five years ago, their combined age was 70, making their present combined age 70 + 10 = 80. This gives the equation 4y = 80, so y = 20. Therefore, the father's present age is 3 * 20 = 60 years.

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