Question

I was stuck in doing Gaussian elimination, I know the correct answer of the question is (1,2,-1), but can anyone point out the problem in my works below, thank you.

/1-23-b) R2-Heal A-terk/4,-z 31-5 213) 07-)12| A-B9Ra / I -L 3-6 07-7 121 -315 2 -J15 p.Wnrk/ 4 o -31 +3P3시00 ) is 6-5丿45 78) 663 3÷-)3-3フ 3-37 mゴ / ,J 1,プ 3) 3づ 7-33-0 0 ) -2 0 7-7 o/ 0 。0) 4031口D/06 |00 | 10-4004口 乀/ 몰 RR 322

Show transcribed image text /1-23-b) R2-Heal A-terk/4,-z 31-5 213) 07-)12| A-B9Ra / I -L 3-6 07-7 121 -315 2 -J15 p.Wnrk/ 4 o -31 +3P3시00 ) is 6-5丿45 78) 663 3÷-)3-3フ 3-37 mゴ / ,J 1,プ 3) 3づ 7-33-0 0 ) -2 0 7-7 o/ 0 。0) 4031口D/06 |00 | 10-4004口 乀/ 몰 RR 322