nag_lapacklin_dtprfs (f07uhc) Example Program Results Solution(s) 1 2 1 -3.0000 -5.0000 2 -1.0000 1.0000 3 2.0000 -1.0000 4 1.0000 6.0000 Backward errors (machine-dependent) 6.9e-17 0.0e+00 Estimated forward error bounds (machine-dependent) 8.3e-14 2.6e-14