Mathematics, 10.09.2021 14:50 pepehammu

Ban phụ huynh mua truyện, vở, bút bi làm phần thưởng cho học sinh giỏi, cả ba loại là 59 thứ và số tiền mua là 310 000 đồng. Biết rằng giá một quyển truyện là 10000 đồng, một quyển vở là 5000 đồng, một cái bút bi là 2500 đồng và số bút bi gấp đôi số quyển vở. Hỏi Ban phụ huynh đã mua bao nhiêu truyện, vở, bút?

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Ban phụ huynh mua truyện, vở, bút bi làm phần thưởng cho học sinh giỏi, cả ba loại là 59 thứ và số t...

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