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Question
Given `A = [(1, 1),(-2, 0)]` and `B = [(2, -1),(1, 1)]`. Solve for matrix X:
X + 2A = B
Solution
X + 2A = B
X = B – 2A
`X = [(2, -1),(1, 1)] - 2[(1, 1),(-2, 0)]`
`X = [(2, -1),(1, 1)] - [(2, 2),(-4, 0)]`
`X = [(2 - 2, -1 - 2),(1 - (-4), 1 - 0)]`
`X = [(0, -3),(1 + 4, 1)]`
`X = [(0, -3),(5, 1)]`
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