题目内容
解方程组
【答案】
【解析】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：
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题目内容
解方程组
【解析】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：
（1）解方程组：