已知关于x、y的二元一次方程组
的解满足方程x﹣2y=4,则k的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6bb10d0bfd94ab46ed367c0aec28d5.png)
21-22八年级上·四川成都·期末 查看更多[8]
更新时间:2022-04-04 09:23:03
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解题方法
【推荐1】对于实数
,
定义运算“
”:
.例如
,因为
,所以
.若
,
满足方程组
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7af7dfa91beee191ee9a1650a8cacbe.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f6647523efa22d440d3ec3d9afbad0.png)
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【推荐1】若关于x,y的二元一次方程组
的解互为相反数,则a= .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7833c1179d1ed8899ecf86967c3422f1.png)
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【推荐2】已知关于x、y的方程组
的解满足
,则m的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f71c866fd798d8f57b2d812f9a59d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d816a6e4a5c6375309040fdda0038b.png)
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