Answer
$x=-5$
$y=6$
$z=6$
Work Step by Step
Two matrices are equal if they are of the same order and their corresponding elements are equal.
Both matrices are of order $2\times 2.$
The elements at position (i,j)=(1,1) must be equal:
$2x=-10$
$x=-5$
The elements at position (i,j)=($1,2$) must be equal:
$y+7=13$
$y=6$
The elements at position (i,j)=($2,1$) must be equal:
$z=6$
The elements at position (i,j)=($2,2$) are equal.
