To find a solution for
To arrive at an answer to (a mathematical problem)
I told you'd I'd solve it!
"Give it time. One man – even Andre – couldn't solve the world's problems. You just have to wait it out. And hope we all come to our senses before the end of the world," Kiki said with a small smile.
Your problem to solve, not mine.
All that time and he was unable to solve his financial problem.
That won't solve your problems.