This is a linear system of equations solver in Excel.
The size of the system is programmable by the user from 2 to 20 which means, depending on the setting selection, the model can instantly find the solution of linear systems starting from 2 equations and 2 unknowns up to 20 equations and 20 unknowns.
It uses the following built-in Excel spreadsheet functions: MMULT(), MINVERSE() and TRANSPOSE().
Like everything on this site, the model is fully open, so you can see how it’s made.
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I am making one totay thought I might index it last Friday.