How to use substitution to solve a system of linear equations

The video tutorial introduces the concept of solving systems of equations using the substitution method. It begins with an explanation of what a system of equations is and how substitution can be applied. The tutorial then demonstrates evaluating functions and expressions by substituting given values. It further explains the substitution method, highlighting its importance in solving systems by replacing variables with equations. An example is provided to illustrate the process, showing how to solve a system by substituting one equation into another to find variable values.

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