This study aims to improve the learning process and improve student’s Mathematical Representation Ability (MRA) by applying Problem Based Learning (PBL) model.The form of this research is Classroom Action Research (CAR) with 2 cycles conducted in class X.2 SMAN 6 Pekanbaru involving 36 students in the odd semester of the 2024/2025 academic year on the subject of Linear Equation and Inequality…