Question: What is the solution?

Solve 10066*a = 10334*a + 268 for a.

Answer: -1

Question: What is the solution?

Solve 21*n + 14 = -28 for n.

Answer: -2

Question: What is the solution?

Solve 352*y + 2 = 364*y - 46 for y.

Answer: 4

Question: What is the solution?

Solve -5818*o - 4592 - 7044 = 0 for o.

Answer:
-2