$\"\"$

For subtracting 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 5.

$\"\"$

$\"\"$ (Multiply each element by 8)

$\"\"$ (Simplify)

$\"\"$

Multiply the matrix by 3.

$\"\"$

$\"\"$ (Multiply each element by3)

$\"\"$ (Simplif)

$\"\"$

Add the matrices

$\"\"$

$\"\"$ (Add the elements)

$\"\"$ (Simplify)

$\"\"$

The value is $\"\"$ .