算法题，求解，在线等......(计算机算法有没有更好的算法)

构建多元一次方程式

1620+30E+50F+50G+60H+70I=1400A

3040+60E+100F+100G+120H+140I=600B

1960+90E+150F+150G+180H+210I=1500C

4280+120E+200F+200G+240H+280I=900D

800+200C+150G+175H+200I=500E

1500+600C+450G+525H+600I=900F

2600+200A=1500G

6600+300A=1800H

5500+400A=2100I

计算机解决这个问题的方法叫做“高斯消去法”
http://blog.csdn.net/ccjjnn19890720/article/details/5157067
http://wenku.baidu.com/link?url=jVV_QrdCJoAR4ZMh2uliyoH7SQzhHVSl8pETGkUE1CkeyD6E5yUbw5DUAHyWde3dN5JY4iDyeKwWrNW54Uq9k5s2arMvJ3pfbr67lFfMUdK
http://baike.baidu.com/link?url=vGccWeEi9nFWFddMhV09ozipwX1qmUliNMm8kvNZBdBLISlYW3KhsdYbNJYX3CBcC0Fkk8pVXrcFwhAFcfZyD_