Mathematics, 26.06.2021 21:30, amy290

Trung bình cộng của ba số là số lớn nhất có hai chữ số. Tìm mỗi số đó, biết số thứ nhất bằng số thứ hai, số thứ ba bằng trung bình cộng của hai số đầu

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Trung bình cộng của ba số là số lớn nhất có hai chữ số. Tìm mỗi số đó, biết số thứ nhất bằng số thứ...