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Xiaoming is 9 years old, his father is 38 years old and his mother is 35 years old. A few years later, the sum of his parents' ages is seven times of Xiaoming's?
Xiaoming is 9 years old, his father is 38 years old and his mother is 35 years old. A few years later, the sum of his parents' ages is seven times of Xiaoming's?
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