We finally came up with a solution (to our problem).我们最终找到了解决（问题的）方案。

He came up with an interesting new method of improving the factory's efficiency.他想到了一个提高工厂效率的有趣的新方法。

He'll be in a lot of trouble if he doesn't come up with the money he owes.如果不还债的话，他将惹上大麻烦。