Question: What is the solution?

Solve 24*s = 68*s + 264 for s.

Answer: -6

Question: What is the solution?

Solve 6*s - s - 25 = 0 for s.

Answer: 5

Question: What is the solution?

Solve 9*s + 75*s + 384 = 36*s for s.

Answer: -8

Question: What is the solution?

Solve 0 = 39*f - 3026 - 2935 + 3387 for f.

Answer:
66