SANTOSO , T. .; NAFIS, H. L. H. .; OKTAMA, M. Y. . Analyzing Students’ Error in Problem Solving of Two-Variable Linear Equation System: A Case Study of Grade Eight Students of Indonesian Junior High School. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 18, n. 11, p. 283–296, 2019. Disponível em: http://www.ijlter.net/index.php/ijlter/article/view/455. Acesso em: 1 may. 2026.