Yumniyati K-, Sujadi I-, Indriati D-. COGNITIVE LEVEL PROFILE AT THE TENTH GRADE OF SENIOR HIGH SCHOOL STUDENTS IN MATHEMATICS PROBLEM SOLVING ON THREE VARIABLES OF LINEAR EQUATION SYSTEM. IOJET [Internet]. 2019 Jul. 7 [cited 2026 Jan. 8];6(3):473-85. Available from: https://iojet.org/index.php/IOJET/article/view/535