Siregar A, Azzahra S, Widiati I. Profile of Mathematical Connection Ability in Material Two-Variable Linear Equation System (SPLDV) In Grade IX SMP. PIJMath [Internet]. 29Nov.2025 [cited 21Feb.2026];4(2):63-2. Available from: https://ojs3.unpatti.ac.id/index.php/pijmath/article/view/19998