解決 かいけつ問題 もんだいじゃありませんでした
mikaiketsumondaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 未解決問題

1. It wasn't an unsolved problem.; It wasn't a problem that remained unresolved.

Past/Perfective
Negative
Polite
Terminal Form