题目内容
（本题满分6分）解方程:
解：方程两边同乘以
-2，得1-+2（-2）=1，································· 2分
即1-+2-4=1，···················································································· 4分
解得=4．···························································································· 5分
经检验，=4是原方程的根．···································································· 6分
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