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Re: Missing link


-----Original Message-----
From: MAvalosJr at <MAvalosJr at> To: mathgroup at
Subject: [mg12680] [mg12652] Missing link

>Is there a way to find in a system of linear equations the numerical
>value of a symbol,say,b. The example below is easy enough with pencil
>and paper but some matrices get a little too complicated and would like
>to find a method with mathematica.
>Suppose the matrix is {{1,3,2,3},{-3,1,4,1},{5,7,2,b}}.  b must have the
>value of 7 in order the system have a solution. 
>Thanks for any suggestions.
>Manuel Avalos
>Mavalosjr at

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