finally, at last

I solve the problem.

私は問題を解決します

I solve the problem after failing many times.

私は何度も失敗した後で問題を解決します

I solve the problem with my team members after failing many times.

私は何度も失敗した後でチーム員と問題を解決します

I finally solve the problem with my team members after failing many times.

私は何度も失敗した後でチーム員とついに問題を解決します

I finally solve the problem with my team members in a new way after failing many times.

私は何度も失敗した後でチーム員とついに新しい方法で問題を解決します