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bichphuongnht
2 năm trước
Một khu đất hình chữ nhật có chiều dài hơn chiều rộng là 10m. Nếu chiều dài tăng thêm 6m, chiều rộng giảm đi 3m thì diện tích mới tăng hơn diện tích cũ là m212 . Tính các kích thước của khu đất. ĐS: 20m, 30m.
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