Intan Buhati Asfyra and Syamsinar 2026. Development of a Hypothetical Learning Trajectory for Systems of Linear Equations in Three Variables Based on PMRI Using the Context of Hijab Accessories: A Pilot Experiment Study. International Journal of Technology and Education Research. 4, 02 (May 2026), 669-682. DOI:https://doi.org/10.63922/ijeter.v4i02.3183.