题目内容
解方程组
解：①´2得：4x+2y=4 ③···················· 1’
②+③得：7x="14··························" 2’
∴x="2·······························" 3’
把x=2代入①得：y=?2······················· 4’
∴原方程组的解为：
②+③得：7x="14··························" 2’
∴x="2·······························" 3’
把x=2代入①得：y=?2······················· 4’
∴原方程组的解为：
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的解为___________． 
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米，根据题意可列出方程组为 。
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