Question: What is the solution?

Solve 4149*c - 4206*c = -301 - 41 for c.

Answer: 6

Question: What is the solution?

Solve 189 = 47*v + 471 for v.

Answer: -6

Question: What is the solution?

Solve -39*i + 102*i = 43*i + 20 for i.

Answer: 1

Question: What is the solution?

Solve 0 = -2265*k + 1912*k - 706 for k.

Answer:
-2