PreCalculus
posted by Caroline .
Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.

Take a look at
http://www.gregthatcher.com/Mathematics/GaussJordan.aspx
You can enter your values and it will show all the intermediate steps in arriving at the solution
If that isn't enough, google your topic and you will find any number of other explanations.