Question: What is the solution?

Solve -15*s + 12*s - 12 = 0 for s.

Answer: -4

Question: What is the solution?

Solve 0 = -59*r + 60*r - 4 for r.

Answer: 4

Question: What is the solution?

Solve -2970 = 3*h - 87*h - 26*h for h.

Answer: 27

Question: What is the solution?

Solve 16 = 5*h - 14 for h.

Answer:
6