PENINGKATAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA MATERI SISTEM PERSAMAAN LINEAR DUA VARIABEL MELALUI PENERAPAN MODEL PROBLEM BASED LEARNING. SOSCIED, [S. l.], v. 7, n. 2, p. 655–664, 2024. DOI: 10.32531/jsoscied.v7i2.868. Disponível em: https://jurnal.poltekstpaul.ac.id/index.php/jsoscied/article/view/868. Acesso em: 19 apr. 2026.