Sum
Given `A = [(1,1),(-2, 0)]` and `B = [(2, -1), (1, 1)]` Solve for matrix X
3X + B + 2A = O
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Solution
3X + B + 2A = O
3X = -2A - B
`3X = -2[(1,1),(-2, 0)] - [(2, -1),(1, 1)]`
`3X = [(-2,-2),(4, 0)] - [(2, -1), (1,1)]`
`3X = [(-4, -1),(3, -1)]`
`X = [((-4)/3, (-1)/3),(1, (-1)/3)]`
Concept: Addition and Subtraction of Matrices
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