Arsandy, Qory Septiani, Anisa Rahmadani Siregar, Ribka Dameria Sinuhaji, Zefanya Tabita Ambarita, Victory Rajani Sinaga, and Budi Halomoan Siregar. “Analisis Kesulitan Siswa Dalam Pemecahan Soal Cerita Sistem Persamaan Linear Dua Variabel Berdasarkan Tahapan Polya”. Papanda Journal of Mathematics and Science Research 4, no. 2 (September 28, 2025): 337–350. Accessed January 12, 2026. https://ejournal.papanda.org/index.php/pjmsr/article/view/2432.