Why do I need 6 electrons on the left side when balancing this redox reaction?

[Dove99x]

I'm not really sure exactly if I'm doing these correctly but what stopped was the choice of adding 6 electrons to the left side..

This is what I did:

This is their answer:

I'm doing something wrong and I don't know why my answer is so different then theirs.

 

[Borek]

I can't see your pictures. Perhaps that's just temporary. Try to attach them to your post.