There should be subtle differences in each version. In general, the People's Education Edition and the Shanghai Science Edition are based on the one-dimensional linear equation as the finale.

In fact, the topic investigation of the linear equation with one variable can be combined with the number axis problem and absolute value problem in the first chapter to investigate the moving point problem.

It is not recommended to think about the general mid-term and final exams, but to review and meet the exams in various ways.