Cramer's Rule to Solve a System of 3 Linear Equations - Example 1

In this video we look at Cramer's Rule to Solve a System of 3 Linear Equations with 3 Unknowns.
We could use other methods such as substitution, Gauss Jordan, or row reduction but instead we will explore Cramer's Rule.
In order to use Cramer's Rule, we are simply computing LOTS of determinants (fun times).
This is not stuff you want to do by hand but a computer would love. That's right: love. Computer love. Kraftwerk. Data date.
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