Q: What is the solution?
Solve 0 = -3*k - 37*k + 120 for k.

A: 3

Q: What is the solution?
Solve 5 = -301*s + 306*s for s.

A: 1

Q: What is the solution?
Solve 0 = 3*r - 24 + 15 for r.

A:
3