How do I construct matrix A from a system of equations?

[jetforcegemin]

Homework Statement

http://img375.imageshack.us/my.php?image=70177175xx7.jpg

The Attempt at a Solution

Hey guys I'm new here and was wondering if i could get some help. I'm stuck on how to construct the matrix A. Any help would be really appreciated!

 

[jetforcegemin]

nevermind guys, i was able to figure it out with a little bit of thinking!