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hero003005
2 năm trước
Một mảnh vườn hình chữ nhật có chu vi 34m, nếu giảm chiều dài 2m và tăng chiều rộng thêm 3m thì diện tích mảnh vườn tăng thêm 20m2 ( mét vuông). Hãy tính chiều dài và chiều và chiều rộng của mảnh vườn đó
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