Solving a System Using the Matrix Equation, AX=B, Example 1

This video walks through an example of solving a linear system of equations using the matrix equation AX=B by first determining the inverse of the coefficient matrix and then multiplying both sides of the equation on the left by the inverse.

[Ylldrit.Miftari]

Thank you so much. This is really helpful.

[cassandranelson]

Thank you, this was very clear and helpful.

[srttexas]

At 1:38 I was confused. Why do you flip the -3 & -7 and why do only the 6 & 8 become negative in their same position. Also.. how did you get the 1/21-48?

[observer]

Does this only work on a 2x2 coefficient matrix?