<![CDATA[This study aimed to describe the learning difficulties experienced by eighth-grade students in understanding and solving One-Variable Linear Equations (PLSV) in mathematics learning at SMPK St. Paulus Karuni. This study employed a qualitative approach with a descriptive qualitative design. The participants consisted of 28 students of class VIII B. Data were collected through observation, interviews, written tests, and documentation. The data were analyzed descriptively through data reduction, data presentation, and conclusion drawing. The results showed that students experienced difficulties in understanding the concepts of One-Variable Linear Equations. These difficulties were reflected in errors in understanding the relationship between the two sides of an equation, determining appropriate operations, and determining the value of the variable. Students also experienced difficulties in problem solving, particularly in identifying the known and asked information, developing mathematical models, determining appropriate strategies, and carrying out solution procedures systematically. The interviews indicated that these difficulties were related to students' limited understanding of the material, insufficient practice, low learning persistence, and lack of concentration during the learning process. The findings indicate that students' difficulties in learning One-Variable Linear Equations are related to both conceptual understanding and the mathematical problem-solving process.]]>
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