Chapter 9 - Systems and Matrices - 9.7 Properties of Matrices - 9.7 Exercises - Page 929: 14

$w=9$ $x=17$ $y=8$ $z=-12$

Two matrices are equal if they have the same dimension and if corresponding elements, position by position, are equal. --- These matrices have the same dimension, 2$\times$2. Position by position, $w=9$ $x=17$ $y=8$ $z=-12$