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PauPham
2 năm trước
Một khu đất hình chữ nhật có chiều dài gấp 5 lần chiều rộng.Nếu tăng chiều rộng 2m và giảm chiều dài 5m thì diện tích khu đất đó tăng 10m vuông.Tính diện tích khu đất đó ??
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