Antaria, Noviana, and Sufyani Prabawanto. “A Systematic Literature Review of students’ Problems in Solving Systems of Linear Inequalities in Two Variables”. Proceedings of International Conference on Research in Education 1, no. 1 (November 26, 2025): 62–70. Accessed May 5, 2026. https://econference.usd.ac.id/index.php/icre/article/view/6.