已知2x+3=2a,y-2a=4,并且a-
<x+y≤2a+
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33d78f02558d84c57e7db6d9c0221ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ba0007addab866459787ebce1e7c99.png)
更新时间:2019-05-07 06:38:56
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解答题-问答题
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适中
(0.65)
【推荐1】解下列方程:
(1)3x+2=7x-8;
(2)4(3y-1)-3(y-1)=12y+17;
(3)
;
(4)
.
(1)3x+2=7x-8;
(2)4(3y-1)-3(y-1)=12y+17;
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd63935a7cd3ee12f94f07f2a9b255d.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8041f1927a04361e9a567de2bd83697.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】解下列方程:
(1)5(x-3)-2(3-x)=-20;
(2)
(2x-5)=
(x-3)-
.
(1)5(x-3)-2(3-x)=-20;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7abf02717d6e59d8a64a65a87c412.png)
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