因为x,y互为相反数
所以2x=2a-12
-x=a-6
得12-a=2a-12
解得a=8
x-y=12-a,x+2y=6-a的解互为相反数求a的值
x-y=12-a,x+2y=6-a的解互为相反数求a的值
sd啊
sd啊
数学人气：540 ℃时间：2020-07-10 02:52:45
优质解答
我来回答
类似推荐
猜你喜欢
- 1黄金一词本意是
- 2有哪些优美的拟人句?
- 3仿写《爬山虎的脚》写爬山虎的脚
- 4一根绳子,剪去他的2分之一,还剩5.2米；那剪去2分之1一米,还剩几米?
- 5已知点P（2,0）和圆C:x^2+y^2-6x+4y+4=0
- 6he waited until the volcano became quiet and he was able to return two days later.
- 7what good can such courses do to our fourture 谁帮我分析下句子结构
- 8选哪个if there were no exams ,we should have ____ at school.A a more happier time B a much happier
- 9已知点（-1,y1）,(2,y2),(3,y3)在反比例函数y=-k2-1/x的图像上,下列结论中正确的是
- 10我喜欢数学和英语用英语怎么说