Q: What is the solution?
Solve 57*f = -3038 + 4634 for f.

A: 28

Q: What is the solution?
Solve 0 = 881*r + 30559 + 19658 for r.

A: -57

Q: What is the solution?
Solve -40*i - 919 = -2003 + 164 for i.

A:
23