$\"\"$

For subtracting matrices, their dimension should be equal.

First write the dimension of the matrix.

The dimensions of matrix A and B are $\"\"$ .

The operation (3C – 4A + B) is possible.

$\"\"$

Multiply the matrix C by 3.

$\"\"$

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

$\"\"$ (Simplify)

$\"\"$

Multiply the matrix A by 4.

$\"\"$

$\"\"$ (Multiply each element by 2)

$\"\"$ (Simplify)

$\"\"$

Perform the operation 6B-2A

$\"\"$

$\"\"$ (Subtract corresponding elements)

$\"\"$ (Simplify)

$\"\"$

(3C - 4A + B) $\"\"$ .