Question:
Solve 0 = 15*h + 137 - 74 + 237 for h..

Answer:
-20

Question:
Solve 16 = -9*m + 17*m for m..

Answer:
2

Question:
Solve 9*s + 12*s = -22*s - 129 for s..

Answer:
-3

Question:
Solve -212*b + 891 = -113*b for b..

Answer:
9