Question: 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

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

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


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

- y 2z = - -4 5 -5 -5


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.

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

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