Q: What is the solution?
Solve 3261*r + 2555*r - 82771 = -2580*r + 127129 for r.

A: 25

Q: What is the solution?
Solve 670*b - 318*b = -565*b - 1834 for b.

A: -2

Q: What is the solution?
Solve -17*q - 4595 + 4408 = 0 for q.

A:
-11