その問題を解くことができた

was able to solve that problem

→ 其の
phrase Rare #32,645
was able to solve that problem Uses ことができた to express past ability or success: “was able to...” or “managed to...”.
JA: 昨日、その問題を解くことができた。
EN: I was able to solve that problem yesterday.

私はその問題を解くことができた

I was able to solve that problem.

その問題を解くことができた

Were you able to solve that problem?

けさ私はその問題を解くことができた

I was able to solve that problem this morning.