“PENINGKATAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIS SISWA MATERI SISTEM PERSAMAAN LINEAR DUA VARIABEL MELALUI PENERAPAN MODEL PROBLEM BASED LEARNING”. SOSCIED 7, no. 2 (November 30, 2024): 655–664. Accessed April 19, 2026. https://jurnal.poltekstpaul.ac.id/index.php/jsoscied/article/view/868.