Q: What is the solution?
Solve -264*r - 1087 + 31 = 0 for r.

A: -4

Q: What is the solution?
Solve 83*s - 120 - 46 = 0 for s.

A: 2

Q: What is the solution?
Solve 6*f + 159 = 147 for f.

A:
-2