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Question
Choose the correct alternative:
What must be the matrix X, if `2"X" + [(1, 2),(3, 4)] = [(3, 8),(7, 2)]`?
Options
`[(1, 3),(2, -1)]`
`[(1, -3),(2, -1)]`
`[(2, 6),(4, -2)]`
`[(2, -6),(4, -2)]`
Solution
`[(1, 3),(2, -1)]`
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