QUESTION: Math problem: Solve 401*o - 361*o = 80 for o.
ANS: 2
QUESTION: Math problem: Solve -30*q + 35*q = -25 for q.
ANS: -5
QUESTION: Math problem: Solve 18*s - 112 - 31 = 19 for s.
ANS: 9
QUESTION: Math problem: Solve r + 3 - 9 = 0 for r.
ANS:
6