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Question
Find x and y if `[(x,3x),(y, 4y)] = [(5),(12)]`
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Solution
`[(x,3x),(y,4y)][(2),(1)] = [(5),(12)]`
`=> [(2x + 3x),(2y + 4y)] = [(5),(12)]`
`=> [(5x),(6y)] = [(5),(12)]`
`∴ 5x = 15 => x = 3 and 6y = 12 => y = 2`
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