University of Oxford mathematician Dr Tom Crawford explains how to solve a system of linear equations using matrices and elementary row operations (EROs).

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Test yourself with some practice exercises courtesy of ProPrep. You can download the workbooks and solutions for free at the links below:
Algebraic Equations
Systems of Linear Equations

You can also find fully worked video solutions courtesy of ProPrep instructors at the links below:
Systems of Two Linear Equations
Linear Systems – Zero or Infinite Systems
Systems of Linear Equations
SLE with Parameter