(15C) 3 Equations with 3 Unknowns

[chromos]

I had no intention of using the HP15C CE for matrix calculations, as the HP Prime is better in that regard. But on the way home from a business trip I was bored (as a passenger of course) so I read the HP15C CE manual and its matrix capabilities. Then when I opened this forum at home, this new thread jumped out at me. :-)

Here is a program to solve n linear equations:
1) type n and press A
2) entering the elements of matrix A and then matrix B using R/S
3) after entering all elements of both matrices, cycle through the resulting matrix C using R/S.

Code:

001    42,21,11    LBL A
002    42,16,0     MATRIX 0
003    36          ENTER
004    42,23,11    DIM A
005    1           1
006    42,23,12    DIM B
007    42,26,13    RESULT C
008    42,16,1     MATRIX 1
009    42,21,1     LBL 1
010    45,16,11    RCL MATRIX A
011    31          R/S
012    u 44 11     STO A
013    22 1        GTO 1
014    42,21,2     LBL 2
015    45,16,12    RCL MATRIX B
016    31          R/S
017    u 44 12     STO B
018    22 2        GTO 2
019    45,16,12    RCL MATRIX B
020    45,16,11    RCL MATRIX A
021    10          ÷
022    45 26       RCL RESULT
023    42,21,3     LBL 3
024    31          R/S
025    u 45 13     RCL C
026    22 3        GTO 3
027    22 3        GTO 3