My Placements (and getting lucky)

So I just finished up my placements. Ended up getting Silver 3 and from what I'm reading I'm lucky. I ended Season 4 in Silver 3 with 90LP and went 8-2 in promos. My games went as follows: W L L W x6. I duo'd with my brother in games 1-3 and 7-10. My brother was Silver 5 at the end of last season. Most of my games were played against mid silver with the about 1 gold enemy per game (my last game even had a plat 5 enemy). I figured by going 8-2 I'd at least get a little bit higher but I guess not. It may have had a little to do with duoing but idk. Overall the placement weren't too awful. Only one afk'r (Sona supp in one of the games i lost). I did terrible in that game and that might have had something to do with why I didn't get placed higher. I've read that early games count more......idk. I'm just glad I can start playing ranked again. I had been playing normals and ugh. I just couldn't take them seriously and they lacked that competitive feeling that ranked gives me. Well just my 2cents.....hit me up