Examine the questions first, list the known conditions in the application questions, and clarify the unknown problems.

Second, analyze the equivalence or inequality in the topic, such as the trip problem.

Thirdly, according to the analyzed relationship, the equations or equations, inequalities or inequality groups are listed.

Fourth, solve equations, equations or inequalities, and inequality groups.

Fifth, check whether the solution conforms to the meaning and practical significance of the problem and make a choice.

Sixth, finally answer the result.

In this way, a math application problem is solved.