Frank is 12 years younger then John

Frank is 12 years younger then John. In 5 years John will be twice as old as Frank. How old will Frank be in four years?

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 #3380