SIMANJUNTAK , Milka; SINAGA , Samuel Juliardi; PANJAITAN , Simon; MANIK , Efron. Analisis Pemahaman Konsep Matematika Siswa Pada Materi Sistem Persamaan Linear Dua Variabel Di Kelas VII SMP Negeri 14 Medan. Innovative: Journal Of Social Science Research, [S. l.], v. 3, n. 2, p. 6784–6798, 2023. Disponível em: https://j-innovative.org/index.php/Innovative/article/view/1100. Acesso em: 30 may. 2026.