Shofa, Gharitza Zahira, et al. “Straight-Linear Equation Learning Design Through Problem Based Learning to Stimulate Junior High School Students’ Critical Thinking Skills”. Mathline : Jurnal Matematika Dan Pendidikan Matematika, vol. 11, no. 3, Aug. 2026, pp. 585-02, doi:10.31943/mathline.v11i3.1170.