数学题:一件商品按成本提高30%,换季又打八折

  • 时间:2020-06-07 17:53:28
  • 分类:数学世界
  • 阅读:144 次

数学题:一件商品按成本提高30%,换季又打八折,降价后每件卖104元,这种商品卖出一件是赔是赚?赔或赚多少钱?[解方程,由“Smile-资优网”提出]

数学题解答:设成本为x元。

(1+30%)x × 80% =104

1.04 x =104

x=100

成本是100元,卖104元。所以是赚了,赚了:104-100=4(元)

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