Question: What is the solution?

Solve 52*k - 216 = -528 for k.

Answer: -6

Question: What is the solution?

Solve 9*i + 30 = 39*i for i.

Answer: 1

Question: What is the solution?

Solve 381*w - 385*w = -4 for w.

Answer: 1

Question: What is the solution?

Solve 1443 = -150*n + 97*n - 836 for n.

Answer:
-43