1. 12 ( x / 2 - 2) = 7 (x / 2 + 3)
2. (x - 1) / 5 + ( 4 - x) / 2 = 2
3. 7( 10 + x) = 12x + 2
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收錄日期: 2021-04-15 17:28:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080725000051KK02450