论文部分内容阅读
希望小学购买了5盏普通书写台灯和3盏调光书写灯,共花了147.5元。如果用一盏调光书写台灯换回2盏普通书写台灯要多花7.3元。聪明的小朋友,你能算出这两种台灯的价格吗?
I hope primary school bought 5 ordinary writing desk lamp and 3 dimming writing lamp, spent a total of 147.5 yuan. If you use a dimmable writing desk lamp in exchange for 2 ordinary writing desk lamp to spend 7.3 yuan. Clever children, can you calculate the price of these two lamps?