The matrix is .
Since b22 is the element in row 2, column 2.
Observe the matrix A; it has 2 rows and 3 columns.
Since b22 is the element in row 2, column 2, the value of b22 = 19.
The matrix b22 element is 19.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3cb8d0d3c7473c3d832fe28c241011f6.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")