Question 83456
solve each system of equations.Let Z be the parameter.

x + 2y +3z =11
2x - y + z = 2
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x   + 2y = -3z+11
2x  -  y = -z+2
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Let A be the coefficient matrix of x and y
Then A^-1 = [.2   .4]
            [.4  -.2]
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Let B = [-3z+11]
        [-z+2  ]
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Then [A^-1][B]= (1/5) [-3z+11-2z+4]
                      [-6z+22+z-2 ]

=[-z+3]
 [-z+4]
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So x= -z+3 and y=-z+4
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Cheers,
Stan H.
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