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hapham0302
2 năm trước
hai xe đi ngược chiều nhau khởi hành cùng một lúc từ hai địa điểm cách nhau 375km . Và gặp nhau sau 5h biết vận tốc xe đi từ A lớn hơn vận tốc xe từ B là 15km/h . Tính vận tố của mỗi xe
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