Question: Find the best approximation to a solution of the given system of equations. 2x + 3y + z = 21 x + y + z

Find the best approximation to a solution of the given system of equations.

            2x + 3y + z =  21

                x + y + z =   7

                -x + y - z = 14 

                   -2y + z =   0

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