Q: What is the solution?
Solve -72*a - 41 = 31 for a.

A: -1

Q: What is the solution?
Solve 4*s + 9 = 1 for s.

A: -2

Q: What is the solution?
Solve -1079*f + 1088*f + 162 = 0 for f.

A:
-18