Question: What is the solution?

Solve 0*n - 2 = -n for n.

Answer: 2

Question: What is the solution?

Solve 0 = -16*a + 42 - 10 for a.

Answer: 2

Question: What is the solution?

Solve 6498*b + 586 = 6377*b - 624 for b.

Answer: -10

Question: What is the solution?

Solve -2400*b = -2365*b + 70 for b.

Answer:
-2