Example description

 F07BBF 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

 Estimate of reciprocal condition number
       1.8E-02

 A has not been equilibrated

 Estimate of reciprocal pivot growth factor
       1.0E+00