Question: What is the solution?

Solve -19914*h - 1170 = -19869*h for h.

Answer: -26

Question: What is the solution?

Solve -6 - 36 = -14*f for f.

Answer: 3

Question: What is the solution?

Solve 21 = 30*i + 58 - 97 for i.

Answer: 2

Question: What is the solution?

Solve -12*r + 2*r - 50 = 0 for r.

Answer:
-5