Question: What is the solution?

Solve 2*f + 170*f - 25 - 531 - 648 = 0 for f.

Answer: 7

Question: What is the solution?

Solve 0 = 4263*w - 3231*w - 63984 for w.

Answer: 62

Question: What is the solution?

Solve -93091 = 5582*x + 349581 + 42962 for x.

Answer: -87

Question: What is the solution?

Solve -2689 = -25*f - 2139 for f.

Answer:
22