【老張線上數理】一元一次不等式全攻略：移項法則與變號關鍵，3 大金鑰讓你解題不失分！📝
Synopsis
欠5 萬跟欠3 萬，哪一個情況比較好？ 很多人在寫不等式時，明明移項都對，最後答案卻錯了，原因就在於你忘了應對數學界的「變 ...
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