Question: What is the solution?

Solve 309*f = -124*f - 585*f - 18324 for f.

Answer: -18

Question: What is the solution?

Solve 2*c + 21 - 31 = 0 for c.

Answer: 5

Question: What is the solution?

Solve 65*f + 226 = -306 - 53 for f.

Answer: -9

Question: What is the solution?

Solve -9069 - 1751 - 5884 = -348*n for n.

Answer:
48