Question: What is the solution?

Solve 34*f = 49 - 15 for f.

Answer: 1

Question: What is the solution?

Solve 0 = -15*o - 19*o + 35*o + 9 for o.

Answer: -9

Question: What is the solution?

Solve 53 = -123*c + 532 + 259 for c.

Answer: 6

Question: What is the solution?

Solve x + 51 - 57 = 0 for x.

Answer:
6