Consider this input file:
$ cat file
value = 1.08759432363
value = 1.08477216702
value = 1.08211988431
value = 1.07947977045
value = 1.07685185457
value = 1.07423631941
value = 1.07163282502
value = 1.06904156798
value = 1.06646245052
To print two columns:
$ awk '{print x+0, $3; x+=50}' file
0 1.08759432363
50 1.08477216702
100 1.08211988431
150 1.07947977045
200 1.07685185457
250 1.07423631941
300 1.07163282502
350 1.06904156798
400 1.06646245052
Saving the output in a file
$ awk '0==a[$0]++' file >outfile
$ cat outfile
value = 1.08759432363
value = 1.08477216702
value = 1.08211988431
value = 1.07947977045
value = 1.07685185457
value = 1.07423631941
value = 1.07163282502
value = 1.06904156798
value = 1.06646245052