Ika Wulan Junianti, Subanji and Susanto, H. (2025) “VARIATION OF VOCATIONAL STUDENTS’ DIFFICULTIES IN SOLVING SYSTEM LINEAR INEQUALITY PROBLEM BASED ON POLYA’S THEORY: VARIASI KESULITAN SISWA KEJURUAN DALAM MENYELESAIKAN SISTEM PERTIDAKSAMAAN LINEAR BERDASARKAN TEORI POLYA”, MaPan : Jurnal Matematika dan Pembelajaran, 13(1), pp. 85–102. doi: 10.24252/mapan.2025v13n1a5.