题目
题型:填空题难度:一般来源:不详
2x+y |
1 |
4 |
答案
2x+y |
1 |
4 |
2x+y |
1 |
2 |
∴2x+y=0,且y-
1 |
2 |
解得:x=-
1 |
4 |
1 |
2 |
则x+y=-
1 |
4 |
1 |
2 |
1 |
4 |
核心考点
举一反三
x+y-8 |
8-x-y |
3x-y-a |
x-2y+a+3 |
A.4 | B.5 | C.2
| D.6 |
2x+y |
1 |
4 |
2x+y |
1 |
4 |
2x+y |
1 |
2 |
1 |
2 |
1 |
4 |
1 |
2 |
1 |
4 |
1 |
2 |
1 |
4 |
x+y-8 |
8-x-y |
3x-y-a |
x-2y+a+3 |
A.4 | B.5 | C.2
| D.6 |