Một đội xe vận tải có trọng tải thỏa mãn : Nếu có thêm 3 xe trong tải 10 tấn và 3 xe trọng tải 9 tấn thì lúc đó trung bình mỗi xe chở được 8 tấn Nếu có thêm 2 xe trọng tải 10 tấn và 1 xe trọng tải 9 tấn thì lúc đó trung bình mỗi xe chở được 7,5 tấn Hỏi đoàn xe có ? chiếc

trinhgiang31102002 6/21/2023 12:55:03 PM

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