點樣計依條方程文字題？
回答 (1)
2008-08-09 5:58 am
✔ 最佳答案
let the no of stamps that 彼得 gets be X,then the no of stamps that 瑪莉 gets is 2X and the no of stamps that 比堤 gets is 3X.
X+2X+3X=120
6X=120
X=20
THEREFORE,
彼得 gets 20,
瑪莉 gets 2*20=40 and
比堤 gets 3*20=60.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080808000051KK03091