College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 5 - Section 5.7 - Properties of Matrices - 5.7 Exercises - Page 553: 8

Answer

$w=5\\ x=6\\ y,=2\\ z=-2$.

Work Step by Step

When two matrices are equal to each other, then their corresponding elements are equal to each other. Thus, in the equation $\begin{bmatrix} 5&x-4 &9\\2 &-3&8\\6&0&5 \end{bmatrix} = \begin{bmatrix}y+3&2 &9 \\z+4& -3&8\\6&0&w \end{bmatrix} $ It can be noticed that the given statement is true when $w=5;\\ x-4=2 \implies x=2+4=6;\\ y+3=5 \implies y=5-3=2;\\ z+4=2\implies z=2-4=-2$. So, the values of $w,x,y,z$ are: $5,6,2,-2$, respectively.
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