The newly price of a drawing tool has decreased 0.5 yuan aft

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/10 12:02:34

The newly price of a drawing tool has decreased 0.5 yuan after a depreciation.the total price of 19 pieces of this tool being bought after the depreciation is less than the total price of 18 pieces of this tool being bought before the depreciation for 6 yuan.What is the former price of this tool.
翻译并解答,并写出这短话有什么固定英语句型,

一种画图工具降价后的新价格比之前少了0.5元.19件该工具降价后的价格比未降价前18件工具的价格少6元.该工具以前的价格是多少?
设以前价格为x元.
(x - 0.5 ) * 19 + 6 = 18x
x = 3.5 (yuan)
数学题,最多的句型就是比较,A is less than B.别的没有什么特殊的了.
本题里还有 this tool being bought after the depreciation,being bought 是被动式的现在分词做后置定语,修饰tool.
再问：可不可以用算数方法解答？
再答：设以前价格为x元。 (x - 0.5 ) * 19 + 6 = 18x x = 3.5 (yuan) 这不是算术吗？我不太明白你的意思。。。
再问：那是方程.....老师，1+1=2,这种教算术方法...........
再答：就是说没有x是吧？ 19 x 0.5 - 6 = 3.5 （元）

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