Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 11 - Additional Topics - 11.2 - 3 x 3 Systems of Equations - Problem Set 11.2 - Page 484: 28


The answer is below.

Work Step by Step

In order to solve this system of equations, we first solve the bottom two equations like any regular system of two linear equations, first isolating x, then solving for x, and then using the value of x to solve for y. Next, using the values of x and y, we would be able to solve for z using the upper equation.
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