Answer
$-31$
Work Step by Step
$2(-30-(-3))-3(6-9)+(-1)(1-15)=2(-30+3)-3(-3)+(-1)(-14)=2(-27)+9+14=-54+23=-31$
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 - Exercise Set - Page 231: 72
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