$\"\"$

For adding and subtracting matrices, their dimension should be equal.

First write the dimension of the matrix.

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

The operation 4A + 2B $\"\"$ C is possible. $\"\"$

Multiply the matrix A by 4.

$\"\"$

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

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

Multiply the matrix B by 2.

$\"\"$

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

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

Perform the operation 4A + 2B $\"\"$ C

$\"\"$

Add and Subtract corresponding elements

$\"\"$

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

The value of (4A + 2B $\"\"$ C) is $\"\"$ .