Question: What is the solution?

Solve 0 = -5*h - 491*h - 12400 for h.

Answer: -25

Question: What is the solution?

Solve -31*f - 623 = 131*f + 349 for f.

Answer: -6

Question: What is the solution?

Solve -90*j - 51 = -76*j + 33 for j.

Answer: -6

Question: What is the solution?

Solve -5*k + 6 = 21 for k.

Answer:
-3