Answer
$\frac{1}{2}$.
Work Step by Step
$1$ in the shaded position can be obtained by multiplying the whole row with $\frac{1}{2}$.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 3 - Section 3.4 - Matrix Solutions to Linear Systems - Concept and Vocabulary Check - Page 228: 4
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