$\"\"$

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 5)

$\"\"$ (The bar indicates repeating decimal) $\"\"$

Multiply the matrix by 4.

$\"\"$

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

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

Perform the operation

$\"\"$ + $\"\"$

$\"\"$ (Subtract corresponding elements)

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

The value is $\"\"$ .