Answer
See below.
Work Step by Step
I prefer reduced row echelon form because then all the numbers in the diagonal are $1$ and each column has only one non-zero element so it is quicker and more obvious to find the solution.
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 8 - Section 8.2 - Systems of Linear Equations: Matrices - 8.2 Assess Your Understanding - Page 573: 92
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