计算及解方程组
(1)
﹣2sin30°;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642400f88db49955e61cb51b55a592ee.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc353d86002edc785eced3b79ab7ec1.png)
更新时间:2022-09-03 09:38:05
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解答题-计算题
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适中
(0.65)
【推荐2】计算并按要求解下列方程组:
(1)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5101835f3660a7aa87224e828684424.png)
(3)(代入法解方程组)
(4)(加减法解方程组)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ffef93d2dda8988a357dee4ee2e757.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5101835f3660a7aa87224e828684424.png)
(3)(代入法解方程组)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10b4b153389108a870a43dd1bb9a8f3.png)
(4)(加减法解方程组)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8233590f7a1c2055669540fbc9941a4.png)
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