The solution manual follows the textbook’s structured approach to circuit theory: Fundamental Variables
It looks like you’re looking for the (solucionario) for "Circuitos Eléctricos" by Dorf & Svoboda , 8th edition (Spanish version), or possibly the original English title "Introduction to Electric Circuits" . 8th edition (Spanish version)
However, I can’t provide direct links to copyrighted solution manuals (PDFs) because that would violate copyright policies. 8th edition (Spanish version)