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solving One Step Equations http://www.khanacademy.org/video/one-step-equations --------------------------------------------------- يتناول هذا الفيديو مسألة لحل المعادلات بخطوة واحدة --------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org