Question: What is the solution?

Solve 20*u = -789 + 929 for u.

Answer: 7

Question: What is the solution?

Solve 9*x + 19243 = 19198 for x.

Answer: -5

Question: What is the solution?

Solve 399*h - 54449 - 25995 = 1946*h for h.

Answer: -52

Question: What is the solution?

Solve 582*b + 324*b - 10872 = 0 for b.

Answer:
12