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Writing and using inequalities 3 http://www.khanacademy.org/video/writing-and-using-inequalities-3 ------------------------------------ يتناول هذا الفيديو مسألة حول كتابة المتباينات واستخدامها ------------------------------------ شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org