SOLUTION: how do you add and subtract matrices?

Question 369886: how do you add and subtract matrices?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
The two matrices have to have the same order, or size (i.e., the same number of rows and the same number of columns.) After that it's just addition/subtraction of corresponding entries. The sum/difference matrix has the same order or size as the matrices involved in the operation.
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