Ptt 大爆卦 | 30 off是幾折 - 前往 https://yamol.tw/item-7.%28+%29+%E6%9F%90%E7%89%A9%E5%93%81%E6%AF%8F%E4%BB%B6%E6%88%90%E6%9C%AC%E7%82%BAx%E5%85%83%EF%BC%8C%E8%8B%A5%E7%85%A7%E6%88%90%E6%9C%AC%E5%8A%A0%E4%B8%89%E6%88%90%E4%BD%9C%E7%82%BA%E5%AE%9A%E5%83%B9%EF%BC%8C%E5%86%8D%E7%85%A7%E5%AE%9A%E5%83%B9%E7%9A%84%E4%B8%83%E6%8A%98%E5%87%BA%E5%94%AE%EF%BC%8C%E5%89%87..-1989602.htm

你即將離開本站

並前往https://yamol.tw/item-7.%28+%29+%E6%9F%90%E7%89%A9%E5%93%81%E6%AF%8F%E4%BB%B6%E6%88%90%E6%9C%AC%E7%82%BAx%E5%85%83%EF%BC%8C%E8%8B%A5%E7%85%A7%E6%88%90%E6%9C%AC%E5%8A%A0%E4%B8%89%E6%88%90%E4%BD%9C%E7%82%BA%E5%AE%9A%E5%83%B9%EF%BC%8C%E5%86%8D%E7%85%A7%E5%AE%9A%E5%83%B9%E7%9A%84%E4%B8%83%E6%8A%98%E5%87%BA%E5%94%AE%EF%BC%8C%E5%89%87..-1989602.htm

7.( ) 某物品每件成本為x元，若照成本加三成作為定價

7.( ) 某物品每件成本為x元，若照成本加三成作為定價，再照定價的七折出售，則此物品每件可賺( 或賠) 多少元？ (A) 賠0.09x (B) 賠0.21x (C) 賺0.09x (D) 賺0.21x.

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