QUESTION: Math problem: Solve 309 = -363*o - 1506 for o.
ANS: -5
QUESTION: Math problem: Solve 7136 = -6*o + 7196 for o.
ANS: 10
QUESTION: Math problem: Solve 55149 = 1280*k - 47251 for k.
ANS: 80
QUESTION: Math problem: Solve 28 + 52 = 20*f for f.
ANS:
4