Question:
Solve -h - 17*h + 72 = 0 for h..

Answer:
4

Question:
Solve -181*u = -186*u + 40 for u..

Answer:
8

Question:
Solve 12*o - 47 = 13 for o..

Answer:
5

Question:
Solve -256*s + 14 = -121*s - 121*s for s..

Answer:
1