$\"\"$

For adding matrices, their dimension should be equal.

First write the dimension of the matrix.

The dimensions of matrix are $\"\"$ .

The operation is possible. $\"\"$

Multiply the matrix by $\"\"$ 4.

$\"\"$

$\"\"$ (Multiply each element by $\"\"$ 4)

$\"\"$ (Simplify) $\"\"$

Multiply the matrix by 3.

$\"\"$

$\"\"$ (Multiply each element by 3)

$\"\"$ (Simplify) $\"\"$

Perform the operation

$\"\"$ $\"\"$

$\"\"$ (Subtract the elements)

$\"\"$ (Simplify) $\"\"$

The value of is $\"\"$ .