$\"\"$

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For adding matrices, their dimension should be equal.

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First write the dimension of the matrix.

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

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The operation $\"\"$ 8C + 3A is possible. $\"\"$

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Multiply the matrix C by $\"\"$ 8.

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$\"\"$

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

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

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Multiply the matrix A by 3.

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$\"\"$

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

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

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Perform the operation $\"\"$ 8C + 3A.

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$\"\"$ $\"\"$ $\"\"$

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$\"\"$ (Subtract corresponding elements)

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$\"\"$ (Product of two same signs is positive)

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

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The value of ( $\"\"$ 8C + 3A) is $\"\"$ .