Solve the system of linear equations using the Gauss-Jordan elimination method. 
Definitions:
Interest Rate
The percentage of a loan that incurs interest for the borrower, usually shown as an annual rate based on the remaining loan balance.
Current Dollars
A term referring to the nominal value of money at the present time, without adjusting for inflation or deflation.
Payment Stream
A sequence of monetary payments that may be periodic or scheduled in some fashion, often related to finance or investing.
Marginal Revenue Product
Additional revenue resulting from the sale of output created by the use of one additional unit of an input.
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