Question: What is the solution?

Solve 286*c - 2575 = 30*c - 259*c for c.

Answer: 5

Question: What is the solution?

Solve -65*x - 1418 + 2198 = 0 for x.

Answer: 12

Question: What is the solution?

Solve 0 = -211*k + 199*k + 120 for k.

Answer: 10

Question: What is the solution?

Solve 0 = 94*c - 82*c - 84 for c.

Answer:
7