solve a problem 解决问题
solve a mystery 解开谜团
solve a puzzle 解开谜题
solve a crisis 化解危机
A: How does he solve such difficult equations?
A：他是怎么解出这么难的方程的？
B: He solves them by using a special formula.
B：他通过使用一个特殊的公式来解它们。
1) 解决（问题、困境）
2) 解答（疑问、谜题）
3) 破解（密码、难题）
1. 解决；解答
verb
1. To find an answer to a problem, question, or mystery.
Synonym: resolve, settle, figure out