Q: Solve:
Solve 19*q + 30 = 4*q for q.

A: -2

Q: Solve:
Solve 0 = 174*r - 2536 - 3412 - 2843 - 4085 for r.

A: 74

Q: Solve:
Solve 600*b = 197*b - 2821 for b.

A:
-7