* Surface Example
  SAS script to solve this system of linear equations:
    5x - 2y = 2
    2x - 7y = -3
  We will solve the matrix equation Av = c for v.
  Note iml means Interactive Matrix Language;

proc iml;
   A = {5 -2,
        2 -7};
   c = { 2,
        -3};
   v = inv(A) * c;
   print v;

run;
quit;

* Output:
     v
0.6451613
0.6129032
;