Question: What is the solution?

Solve 43*b - 79 = 93 for b.

Answer: 4

Question: What is the solution?

Solve 0 = 531*f - 523*f - 72 for f.

Answer: 9

Question: What is the solution?

Solve 13*i - 6 = 7*i for i.

Answer: 1

Question: What is the solution?

Solve 224 = 79*v - 51*v for v.

Answer:
8