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What must be the matrix X , is `2X+[[1,2],[3,4]]=[[3,8],[7,2]]?`A. `[[1,3],[2,-1]]`B. `[[1,-3],[2,-1]]`C. `[[2,6],[4,-2]]`D. `[[2,-6],[4,-2]]`

Answer» Correct Answer - A
`2X+[[1,2],[3,4]]=[[3,8],[7,2]]`
`rArr 2X=[[3,8],[7,2]]=[[1,2],[3,4]]`
`=[[2,6],[4,-2]]`
`X=[[1,3],[2,-1]]`


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