10. The age of father is 40 years more than that of his son. After 5 years, father's

Описание к видео 10. The age of father is 40 years more than that of his son. After 5 years, father's

10. The age of father is 40 years more than that of his son. After 5 years, father's age will be thrice his son's age. Find their present ages.

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