QUESTION: Math problem: Solve 10*u + 60 = 20 for u.
ANS: -4
QUESTION: Math problem: Solve 5406*f - 418109 = -746*f - 147525 + 252336 for f.
ANS: 85
QUESTION: Math problem: Solve 1782 = 73*h - 580 + 99 for h.
ANS: 31
QUESTION: Math problem: Solve -15*d - 19 = -79 for d.
ANS:
4