$\"\"$

The matrix is $\"\"$ .

The first matrix has $\"\"$ row and $\"\"$ column, thus dimensions of matrix are $\"\"$ .

The second matrix has $\"\"$ row and $\"\"$ columns, thus dimensions of matrix are $\"\"$ .

The third matrix has $\"\"$ row and $\"\"$ columns, thus dimensions of matrix are $\"\"$ .

The dimensions of matrix are not equal.

The operation of addition is impossible.

$\"\"$

The operation of addition is impossible.