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Use the elementary row operation R(1) to...

Use the elementary row operation `R_(1) to R_(1)-3R_(2)` in the matrix equation `[{:(4,2),(3,3):}]=[{:(1,2),(0,3):}][{:(2,0),(1,1):}]`

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The correct Answer is:
`[{:(-5,-7),(3,3):}]=[{:(1,-7),(0,3):}][{:(2,0),(1,1):}]`
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