摘要：This article has as central objective the diagnostic test of the activity of Problem Situations in Linear Equations System in a discipline. The subjects of the survey sample were 55 students. The methodological process is qualitative and it was performed by applying evidence pencil and paper as an instrument. However, the explanatory analysis is based on the actions of the Activity Problem Situations in Mathematics, on the Theory of stepwise formation of mental actions by Galperin and principles of Mathematical problem solving by Polya. As a result, it was observed that the students have not resolved the issues in a meaningful way and, when they have done it, the way was empirically.
关键词：Activity Theory;Systems of Linear Equations;Activity Problem Situations in Mathematics.;Théorie de l'activité;Systèmes d'équations linéaires;Activité problème situations en mathématiques.;Teoria da Atividade;Sistemas de Equações Lineares;ASP.
