nag_dgbrfs (f07bhc) Example Program Results

 Solution(s)
            1          2
 1     -2.0000     1.0000
 2      3.0000    -4.0000
 3      1.0000     7.0000
 4     -4.0000    -2.0000

Backward errors (machine-dependent)
    1.1e-16     9.9e-17 
Estimated forward error bounds (machine-dependent)
    1.6e-14     1.9e-14