Mon Feb 24 07:57:58 2020 

solvematrix_test
  R version 3.4.4 (2018-03-15) 
  solvematrix(A,b) solves A*x=b by transforming the linear system
  to row reduced echelon form (RREF).

The matrix A:

     [,1] [,2] [,3]
[1,]    5    8    6
[2,]    5    2    5
[3,]    5    2    4

The RREF of A:

     [,1] [,2] [,3]
[1,]    1    0    0
[2,]    0    1    0
[3,]    0    0    1

Right hand side b of A*x=b

[1] 39 24 21

Solution x of A*x=b

[1] 1 2 3

The matrix B:

     [,1] [,2] [,3] [,4]
[1,]    2    4    3    7
[2,]    4    9    6    3
[3,]    2    4    7    9

The RREF of B:

     [,1] [,2] [,3]   [,4]
[1,]    1    0    0  24.75
[2,]    0    1    0 -11.00
[3,]    0    0    1   0.50

The matrix C:

     [,1] [,2] [,3]
[1,]    2    5    3
[2,]    8    1    8
[3,]    5    2    4

The RREF of C:

     [,1] [,2] [,3]
[1,]    1    0    0
[2,]    0    1    0
[3,]    0    0    1

solvematrix_test
  Normal end of execution.
Mon Feb 24 07:57:58 2020