Question: What is the solution?

Solve -30710*c + 342 = -30767*c for c.

Answer: -6

Question: What is the solution?

Solve 118*f - 1736 = 431*f + 1394 for f.

Answer: -10

Question: What is the solution?

Solve -429294*z + 429282*z - 204 = 0 for z.

Answer: -17

Question: What is the solution?

Solve -2775*b = -2787*b + 84 for b.

Answer:
7