SOLUTION: If A is a 3 × 4 matrix, B is a 4 × 12 matrix, and C is a 12 × 2 matrix, then A + B − C = ??

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Question 148897: If A is a 3 × 4 matrix, B is a 4 × 12 matrix, and C is a 12 × 2 matrix, then A + B − C = ??
Answer by jim_thompson5910(21685) About Me  (Show Source):
You can put this solution on YOUR website!
You cannot add and subtract matrices of different sizes. If B was 3 x 4 and C was 3 x 4, then you could perform the operations.