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Two Passing Bicycles Word Problem http://www.khanacademy.org/video/two-passing-bicycles-word-problem ------------------------------------------------------------- يتناول هذا الفيديو حل لمسألة توضح طريقة كتابة المعادلات وحلها ------------------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org