When 30 is subtracted from a number, it reduces to seven-twelve of…

When 30 is subtracted from a number, it reduces to seven-twelve of the number. What is the sum of the digit of the number

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 #20126