Question: What is the solution?

Solve 0 = -403*x + 1501 + 9380 for x.

Answer: 27

Question: What is the solution?

Solve -38*d - 39321 + 38637 = 0 for d.

Answer: -18

Question: What is the solution?

Solve -2 + 6 = -f for f.

Answer: -4

Question: What is the solution?

Solve 843*b - 4488 = 1580*b - 941*b for b.

Answer:
22