da Silva Ferreira A, Maria de Medeiros K. 9th grade students’ understanding of Linear Equation problem-solving in a municipal public school in Pernambuco. RPEM [Internet]. 2026 May 20 [cited 2026 Oct. 13];15(36):01-25. Available from: https://periodicos-hml.unespar.edu.br/rpem/article/view/10790