Question: What is the solution?

Solve 379 = 215*s - 99*s - 85 for s.

Answer: 4

Question: What is the solution?

Solve 19*s - 21*s = -6 for s.

Answer: 3

Question: What is the solution?

Solve 1881*h - 178038 = -1416*h for h.

Answer: 54

Question: What is the solution?

Solve -140*n - 51*n = -2504 - 934 for n.

Answer:
18