Wyzant
Wyzant: Solving Systems of Equations by Matrix Method
Reference material with examples of how to solve system of equations by the matrix method.
Other
Math Portal: Row Reduction Method
A step by step of how to solve systems of linear equations using the row reduction method.
Cool Math
Coolmath: Solving 2 X 2 Systems of Equations With Cramer's Rule Exercises
Solving 2 x 2 Systems of Equations with Cramer's Rule. Work the problems out then check your answer.
Cool Math
Coolmath: Solving 3 X 3 Systems of Equations With Cramer's Rule Practice
Practice solving 3 x 3 Systems of equations with Cramer's Rule.