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Hoàng Thu Hương
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2024-05-20 20:33:52
My mother is both beautiful, capable and resourceful
2024-05-20 20:29:30
Viên phấn trắng
2024-05-20 20:26:40
Bài giải:
2 lần tuổi cha bằng 7 lần tuổi con nghĩa là tuổi con bằng 2/7 tuổi cha.
Tuổi con khi đó là: 30 : (7 - 2) x 2 = 12 tuổi
Vậy sau số năm là: 12 - 4 = 8 năm
Đáp số: 4 năm
2024-05-20 20:24:05
Cầu Tràng Tiền ở Huế, được bắc qua sông Hương nhé.