Q: Solve:
Solve 0 = -8*q + 5*q - 21 for q.

A: -7

Q: Solve:
Solve 10*k - 14 + 4 = 0 for k.

A: 1

Q: Solve:
Solve 0 = 139*b - 3237 - 6747 - 5767 + 1295 for b.

A:
104