Solve the system using Gauss-Jordan elimination. 
Definitions:
Variable Factor
In economics, it refers to any input whose quantity can be changed in the short term to affect production levels.
Increasing Returns to Scale
A situation in which output increases by a greater proportion than the increase in inputs used.
Average Costs
The total cost of production divided by the total quantity produced, reflecting the cost per unit of output.
Isocost Line
A graph representing all combinations of inputs that have the same total cost.
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