ZUFFI, Edna Maura. Problem Solving and Linear Systems: a case study in high school involving a simplified scaling method. Sigmae, [S. l.], v. 6, n. 2, p. 27–35, 2018. Disponível em: https://publicacoes.unifal-mg.edu.br/revistas/index.php/sigmae/article/view/608. Acesso em: 27 apr. 2024.