QUESTION: Math problem: Solve 4451 = 6*a + 4415 for a.
ANS: 6
QUESTION: Math problem: Solve 0 = -208*a + 210*a for a.
ANS: 0
QUESTION: Math problem: Solve -21 + 129 = 191*z - 197*z for z.
ANS: -18
QUESTION: Math problem: Solve 83308 = -4913*f + 291266 + 116300 for f.
ANS:
66