Zahrah, Fathimatuz, and Somakim Somakim. “Analyzing Students’ Problem-Solving Skills in a Project-Based STEM Learning Environment on Systems of Linear Equations”. Mosharafa: Jurnal Pendidikan Matematika, vol. 14, no. 3, July 2025, pp. 655-72, doi:10.31980/mosharafa.v14i3.2353.