QUESTION: Math problem: Solve 1397 = -70*c - 130 + 267 for c.
ANS: -18
QUESTION: Math problem: Solve -3*n - 147 = -129 for n.
ANS: -6
QUESTION: Math problem: Solve 2*b = -52 + 60 for b.
ANS: 4
QUESTION: Math problem: Solve 39*u = 1374 - 672 for u.
ANS:
18