QUESTION: Math problem: Solve -107*u + 109*u = -2 for u.
ANS: -1
QUESTION: Math problem: Solve 577 = -23*b + 150*b - 566 for b.
ANS: 9
QUESTION: Math problem: Solve -24*j - 903 = -60*j - 7*j for j.
ANS: 21
QUESTION: Math problem: Solve -15 = -50*f - 81 - 134 for f.
ANS:
-4