In Example 3, change the −4 in the top equation to −2 and then solve the system of equations.

Data from Example 3

Use matrices to solve the system of equations

Setting up matrices A, C, and X, we have

Finding A⁻¹ (see Example 4 of Section 16.3) and solving for X, we have

Thix means that x = −2, y = 1, and z = 4.

Transcribed Image Text:

x + 2y z = 3x + 5y z = - -2x - y 2z = - -4 −5 -5 -5