SIAHAAN, Meiva Marthaulina Lestari; FITRIANI; LELI, Angelika Rosa Da Lima. A Study of Learning Obstacles: Determining Solutions of a System of Linear Equation Using Gauss-Jordan Method. Mosharafa: Jurnal Pendidikan Matematika, [S. l.], v. 12, n. 1, p. 25–34, 2023. DOI: 10.31980/mosharafa.v12i1.748. Disponível em: https://journal.institutpendidikan.ac.id/index.php/mosharafa/article/view/748. Acesso em: 5 jul. 2024.