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.

This applet is provided by Walch Education as supplemental material for the UCSS Secondary Math II program. Visit www.walch.com for more information on our resources.