For subtracting matrices, their dimension should be equal.
\First write the dimension of the matrix.
\The first matrix is
The matrix has 4 row and 3 columns, so dimensions of matrix are .
The second matrix is
The matrix has 4 row and 3 columns, so dimensions of matrix are .
The dimensions of matrix are equal. The operation of addition is possible.
\Add the corresponding elements.
\ (Subtract corresponding elements)
(Product of two same signs is positive)
(Simplify)
The solution is .