QUESTION: Math problem: Solve -235 = -31*f - 545 for f.
ANS: -10
QUESTION: Math problem: Solve 727*m = -737*m + 1455*m + 81 for m.
ANS: 9
QUESTION: Math problem: Solve -74 = 12*m - 98 for m.
ANS: 2
QUESTION: Math problem: Solve -m - 19*m - 309 + 2619 = 2*m for m.
ANS:
105