Question:
Solve 31*n - 96 = 121 for n..

Answer:
7

Question:
Solve 105 = 17*b - 2*b for b..

Answer:
7

Question:
Solve -85 + 11 = 17*d + 11 for d..

Answer:
-5

Question:
Solve -150*h - 6 = -156*h for h..

Answer:
1