Alfiyah K, Arisa N. STUDENTS’ CONCEPTUAL UNDERSTANDING OF SYSTEMS OF LINEAR EQUATIONS IN TWO VARIABLES: A DESCRIPTIVE QUANTITATIVE STUDY AT THE JUNIOR HIGH SCHOOL LEVEL. Perpendicular [Internet]. 2025 Dec. 30 [cited 2026 Jan. 19];1(2):80-9. Available from: https://jurnal.dokicti.org/index.php/perpendicular/article/view/1532