A manilla folder with the title '20 Simultaneous Linear Equations' containing program documentation for:
- Handwritten notes entitled 'Triangle Problem' and 'Triangulation - Linear Equations'.
- T520 B119 Solution of Linear Equations.
- T521 B120 Solution of Simultaneous Linear Equations. Part I Input-Triangulation. Part II Back Substitution.
- T522 B120 Number of equations possible-30.
- Binary Equivalents.

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