126.J brought pens in boxes of 5 for $0.8 each box, she sold all pens in boxes of 3 for $0.6 each box. If she made a profit of $8, how many boxes did she brought and sold?
A. 40; B 80; C 100; D 200; E 400
这题,很简单,最后草草算了一下选了D。所以不要拘泥于一道题阿!不然这些分都白白丢了!
还是有点不明白,如果是铅笔应当有200个,盒数的话到底是几呢
设有X盒 (X/30)*0.6-0.8*x=8, X=40啊,不明白为什么大家都说是200,就算是买的盒数加上卖的数量,也不是200吧。
偶很晕,望NN指教,万分感谢
200支,brought40盒。
考试时注意问题是怎么问的.
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