Using linear equations to model and analyze economic phenomena such as supply, demand, and economic balance. م ع ش [انترنت]. 30 سبتمبر، 2025 [وثق 16 ديسمبر، 2025];9(36):1403-20. موجود في: https://cjos.histr.edu.ly/index.php/journal/article/view/677