阅读材料,解答问题.
材料:利用解二元以次方程组的代入消元法可解形如
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/0.png)
的方程组.
如:由(2)得y=x-1,代入(1)消元得到关于x的方程:x
2-x+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/1.png)
=0,∴x
1=x
2=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/2.png)
将x
1=x
2=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/3.png)
代入y=x-1得y
1=y
2=-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/4.png)
,∴方程组的解为
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/5.png)
.
请你用代入消元法解方程组
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102304773482413/SYS201311031023047734824027_ST/6.png)
.
考点分析:
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