Q: What is the solution?
Solve -71*r - 18 = -65*r for r.

A: -3

Q: What is the solution?
Solve -9987*f - 286170 = -552018 - 593034 for f.

A: 86

Q: What is the solution?
Solve -108 = -348*u + 367*u + 63 for u.

A:
-9