Question: What is the solution?

Solve -28*h - 102 = 15*h - 9*h for h.

Answer: -3

Question: What is the solution?

Solve -108 = -563*j + 599*j for j.

Answer: -3

Question: What is the solution?

Solve 0 = -39*h + 137*h + 963 - 277 for h.

Answer: -7

Question: What is the solution?

Solve -30 = 5*x - 15 for x.

Answer:
-3