449

來源: 雙喜臨門2024 於 2025-11-19 19:03:48 [舊帖] [給我悄悄話] 本文已被閱讀：次

中間數是225，225-4x=1,所以x=56, 225+4*56=449

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.