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maithuuyen2k7
2 năm trước
Giải giúp mình bài này với Hai đội thợ quét sơn 1 ngôi nhà. Nếu họ cùng làm thì 4 ngày xong công việc. Nếu họ làm riêng thì đội 1 hoàn thành công việc nhanh hơn đội 2 là 6 ngày. Hỏi nếu làm riêng thì đội 1 sẽ hoàn thành công việc trong bao nhiêu ngày. Các bạn trình bày lời giải ra giúp mình nhé!!
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