Q: What is the solution?
Solve 6531 = 31*i + 6562 for i.

A: -1

Q: What is the solution?
Solve 138*n + 4 = 140*n for n.

A: 2

Q: What is the solution?
Solve 19606 = -1410*x + 2686 for x.

A:
-12