题目内容
（本小题满分8分）解方程：
解：由题意得：
··································· （2分）
由方程（2）得：
代人（1）式得
············································································· （1分）
解得，
或
．·································································· （2分）
代人得
或
································································· （2分）解析:
略
··································· （2分）由方程（2）得：
代人（1）式得············································································· （1分）解得，
或．·································································· （2分）代人得
或································································· （2分）解析:略
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并在所给的数轴上表示出其解集．