A: No. Mataix passed away in 2015, and his textbook does not include a separately published official solution manual. The existing solucionarios are collaborative works by professors and advanced students.
Some independent engineering educators on platforms like Tutoría Engineering or Apuntes de Ingeniería sell professionally compiled solution manuals for Mataix. These typically cost $15–$30 USD but are guaranteed high quality – typeset in LaTeX, with 3D diagrams of impellers, and fully referenced to the 4th or 5th edition. A: No
In many Latin American and Spanish universities, student-run engineering groups (centros de estudiantes) compile their own solution manuals. These are often higher quality than any commercial option because they focus on teaching, not just answers. Search Facebook or WhatsApp groups for "Mataix solucionario grupo de estudio." These are often higher quality than any commercial