(1)
;
(2)解方程组:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0b5b2761c96a7c9ee5d75d915b380b.png)
(2)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80befeed4a0ba183056f5a1c0a74e0e3.png)
更新时间:2023-01-02 18:22:49
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解答题-问答题
|
较易
(0.85)
【推荐2】解方程组或不等式组:
(1)用代入法解方程组
;
(2)用加减法解方程组
.
(3)解不等式组:
,并把解集在数轴上表示出来.
(1)用代入法解方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464fa061abb0eb38e8a13b04ff350c1a.png)
(2)用加减法解方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e96862d7d40a2eeee7c2cc2213b217a.png)
(3)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390ff97cec6c4de5252600f648fc2ef4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/797fcb99-d6b7-4d1d-9c3c-5e3487c8e775.png?resizew=296)
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