A man is 29 years older than his son

A man is 29 years older than his son. In two years, his age will be twice the age of his son. The present age of his son is:

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #2559