Let A be a 3x3 invertible matrix. The reduced row-echelon form of A is obtained by performing the following three elementary row operations in order: (i) First multiply row I by-2. (ii) Then add 4 times row 3 to row 1. (iii) Then finally interchange rows 3 and 1. Then what is det(A)? det(A) = 0 27

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A: The given matrices, A=-2103 and B=2-31-2 We have to find the matrix X, that satisfies 2A+X=3B

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A: Since you have posted a multipart question, but according to guidelines we will solve first three…

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