Question: What is the solution?

Solve -198*f + 1 - 199 = 0 for f.

Answer: -1

Question: What is the solution?

Solve -265*j = -245*j - 180 for j.

Answer: 9

Question: What is the solution?

Solve 0 = 2*o - 4 - 2 for o.

Answer: 3

Question: What is the solution?

Solve 76*u - 4335 = -61*u - 110*u + 3075 for u.

Answer:
30