Answer
See below.
Work Step by Step
Plugging in the values into the equations:
$2(1)-3(-1)+4(2)=2+3+8=13$
$1+(-1)-2=1-1-2=-2$
$5(1)+4(-1)+2=5-4+2=3$
All of the equations are satisfied, thus it is in fact a good solution.
Differential Equations and Linear Algebra (4th Edition)
by Goode, Stephen W.; Annin, Scott A.
Published by
Pearson
ISBN 10:
0-32196-467-5
ISBN 13:
978-0-32196-467-0
Chapter 2 - Matrices and Systems of Linear Equations - 2.3 Terminology for Systems of Linear Equations - Problems - Page 144: 1
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