: Use a program like WinRAR or 7-Zip to open the archive.
: Move to solving multiple variables using substitution or elimination methods. EQUACIONES DE MATEMATICA.rar
: Before opening, run the file through an antivirus or VirusTotal to ensure it does not contain malware disguised as math notes. Resumen (Answer) : Use a program like WinRAR or 7-Zip to open the archive