This precalculus video tutorial provides a basic introduction into the gauss jordan elimination which is a process used to solve a system of linear equations by converting the system into an augmented matrix and using elementary row operations to convert the 3x3 matrix into its reduced row echelon form. You can easily determine the answers once you convert it to that form.
Matrices - Free Formula Sheet:
https://www.video-tutor.net/precalculus-formula-sheets.html
Matrices - Video Lessons:
https://www.video-tutor.net/matrix.html
Final Exam and Test Prep Videos:
https://bit.ly/41WNmI9