Question: What is the solution?

Solve -61*c = -293 - 256 for c.

Answer: 9

Question: What is the solution?

Solve -4080*u - 54 = -4071*u for u.

Answer: -6

Question: What is the solution?

Solve 10011*x - 62 = 9931*x - 382 for x.

Answer: -4

Question: What is the solution?

Solve 258 - 485 = 2*b - 255 for b.

Answer:
14