This algebra video tutorial explains how to solve system of equations with 3 variables and with word problems. It contains two example word problems on investment and on total value.
Matrices - Free Formula Sheet: https://www.video-tutor.net/algebra-formula-sheet.html
System of Equations:
https://www.video-tutor.net/systems-of-equations.html
Final Exam and Test Prep Videos:
https://bit.ly/41WNmI9
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