# UCSS Math II 3B.5.2 Example 3

- Author:
- Walch Education

Use matrices to solve the following system of equations without using a calculator.

- Arrange the equations so that the variables are on the left in alphabetical order and the constant terms are on the right.
- Write the system as a matrix equation of the form
. - Find the inverse of matrix
. - Multiply both sides of the original matrix equation by
following the formula . - Multiply the matrices using matrix multiplication.
- Simplify the rewritten matrix equation.
- State the solution to the system of equations.

*UCSS Secondary Math II*program. Visit www.walch.com for more information on our resources.