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Mathematics, 03.06.2021 14:00 changemyfate69

Hao Sheng, his father and his grandfather have an average age of 53. One-half of his grandfather's age, plus one-third of his father's age, plus one-fourth of Hao Sheng's age is 65. If 4 years ago, Hao Sheng's grandfather was four times as old as Hao Sheng, then how old are they now?

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