Question: What is the solution?

Solve 29*a = 83*a for a.

Answer: 0

Question: What is the solution?

Solve 3098*f - 3090*f = -48 for f.

Answer: -6

Question: What is the solution?

Solve -90117*h = -90087*h + 330 for h.

Answer: -11

Question: What is the solution?

Solve -31*u + 704 = 7*u + 172 for u.

Answer:
14