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歡迎您訪問數學考題練習:某商品的價格標簽已丟失,售貨員只知道“它的進價!

數學考題練習:某商品的價格標簽已丟失,售貨員只知道“它的進價

更新時間:2024-01-12 16:33:42作者:貝語網校

某商品的價格標簽已丟失,售貨員只知道“它的進價為80元,打七折售出后,仍可獲利5%”.你認為售貨員應標在標簽上的價格為______元.

A.110

B.120

C.150

D.160

試題答案

B

試題解析

首先假設出標簽上寫的價格,然后七折售出后,賣價為0.7x,仍獲利5%,即獲利(80×5%)元,這樣可列出方程.

解答:假設標簽上寫的價格是x元,

由題意可列出方程:0.7x-80=80×5%,

解得:x=120(元),即售貨員應該在標簽上寫的價格是120元.

故選B.

點評:此題考查了一元一次方程的應用,首先讀懂題目的意思,根據題目給出的條件,找出合適的等量關系,列出方程,再求解.

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