题目内容
解方程：
解：原方程组即为
···································· （2分）
由方程（1）代人（2）并整理得：
······························································· （2分）
解得，
························································ （2分）
代人得
···································· （2分）由方程（1）代人（2）并整理得：
······························································· （2分）解得，
························································ （2分）代人得
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