C1 : Tìm y , biết 378 : 0,25 - ( y : 4 + y : 0,125 ) x 0,5 = 14,25 C2 : Một cửa hàng bán nồi cơm điện với giá 510 000 đồng thì được lãi 6% theo giá bán . Hỏi giá vốn của nồi cơm điện đó là bao nhiêu ? Nkank giúp eim Giải thích cách lm #DONOTCOPY

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