Question: How to do it in maple 16. I have no idea with it..!!

1) Define 3 x 3 matrix M first by generating a random matrix using RandomMatrix(3,3generator=1...9) such that the row reduced form reveals one free variable and then letting M equal this matrix. If you set M equal to the Random Matrix command, it will generate a different matrix every time. You do not want to this happen 2) using the matrix A that you defined in problem 1, define a vector b such that the matrix equation Mx = b can be solved and find it's solution.

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