Silgado-Tuñón, D. A., Barrios Mercado, J. C., & Montelongo Aguilar, O. (2026). Conceptual understanding of systems of Linear Equations in secondary education: a didactic proposal using GeoGebra. Amazonia Investiga, 15(87), 93–105. https://doi.org/10.34069/AI/2026.87.01.8