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copied!<p><strong>Disclaimer:</strong> I don't know anything about Gauss-jordan elimination and never heard of it.</p> <p>The answer is clear though! </p> <p>Either your math is off, or you are grabbing the wrong numbers. </p> <p>As was suggested by manuell in the first comment to your post, you need to see what numbers are being used. </p> <p>A simple way to debug in console that I use is: <code>writeln('whatever variable: ' + VARIABLE)</code>.</p> <p>you can use a <code>MemoList</code> if you are in a GUI development to do the same thing. You will be surprised of the results sometimes. </p> <p>Also use the right functions for what you want <code>floatToStr</code> and <code>strToFloat</code> are not what you want probably.</p> <p><strong>Edit:</strong></p> <p>Looked up Gauss-jordan elimination also known as row reduction and it turns out to be simple matrices algebra. </p> <p>I never knew that is what is called likely because although attributed to Gauss, it was <a href="http://en.wikipedia.org/wiki/Gaussian_elimination#History" rel="nofollow">already known</a> to Chinese mathematicians in 179 AD.</p> <p>A good example is found here: <a href="http://www.youtube.com/watch?v=Xc37YM59vVA" rel="nofollow">http://www.youtube.com/watch?v=Xc37YM59vVA</a></p> <p>A good example in Delphi, although written in an earlier version: Delphi-3 programming language, with source code is found <a href="http://www.davdata.nl/math/gauss.html" rel="nofollow">here</a></p> <p>Another example but has much more than Gaussian elimination so you have to look at the code can be found <a href="http://www.monash.edu.au/policy/spartext.htm" rel="nofollow">here</a></p> <p><a href="http://megasnippets.com/en/source-codes/cpp/gauss_jordan_elimination" rel="nofollow">Here</a> is an example in C++</p> <p>So now I am sure you have solved it or lost your login to SO. Good luck and enjoy the process as that is the best part.</p>

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