Mathematics, 19.06.2021 09:00, ehaynie

Cho một hình chử nhật có chiều dài gấp 3 lần chiều rộng. Nếu tăng chiều dài Lên 7cm và giữ nguyên chiều rộng thì diện tích sẽ tăng thêm 630cm2. Tính chu vi hình chử nhật ban đầu.

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Cho một hình chử nhật có chiều dài gấp 3 lần chiều rộng. Nếu tăng chiều dài Lên 7cm và giữ nguyên ch...