is it possible that silver can team up with plat in solo que?

is it possible that silver can team up with plat in solo que? I just met the enemies with 4 silvers and 1 plat is that possible?

Riot described the que limitations like this Queue Limitations

When you’re ready to party up with other players for ranked, you’ll need to consider your placement on the ladder. Most players will be able to queue with players within one tier of their rank. During placement matches, you’re restricted based on last season’s rank (the default is Silver tier if you were unranked last season). These restrictions get tighter the higher you go: Silver Tier: Can only queue with Bronze, Silver, and Gold Tier players. Gold Tier: Can only queue with Silver, Gold, and Platinum Tier players.

But how is that possible?