GIúp em với mọi người ơi hứa sẽ cho 5 sao Một cửa hàng có toonrg cộng 28 chiếc Ti vi và tủ lạnh. Giá mỗi cái tủ lạnh là 15 triệu đồng, mỗi cái ti vi là 30 triệu nếu bán hết 28 cái Tivi và tủ lạnh này chủ cửa hàng sẽ thu được 720 triệu. Hỏi mỗi loại có bao nhiêu cái ?

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