Question: What is the solution?

Solve 0 = 11*c - 55 for c.

Answer: 5

Question: What is the solution?

Solve 20*p - 128 = 163 + 169 for p.

Answer: 23

Question: What is the solution?

Solve 2464 - 755 + 1858 = -123*r for r.

Answer: -29

Question: What is the solution?

Solve -78*i - 22*i + 200 = 0 for i.

Answer:
2