Question: Find the best approximation to a solution of each of the following systems of equations. (a) x + y - z = 5 2x -

Find the best approximation to a solution of each of the following systems of equations.
(a) x + y - z = 5
2x - y + 6z = 1
3x + 2y - z = 6
-x + 4y + z = 0
(b) 3x + y + z = 6
2x + 3y - z = 1
2x - y + z = 0
3x - 3y + 3z = 8

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