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OpenStudy (anonymous):
Let A denote the matrix [ R1> 4 5 8 7 R2 > 3 5 4 3 R3> 8 5 5 5 ] After performing two elementary operations , the following matrix is obtained [ R1 > 4 5 7 8 R2 5 6 7 x R3> 5 6 3 1] What is x? Does anyone know the basic idea behind this ?
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