Question:
Solve 0 = 87915*h - 85998*h + 21087 for h..

Answer:
-11

Question:
Solve 42*s = -63 - 315 for s..

Answer:
-9

Question:
Solve -1229*z + 210*z = 694*z + 51390 for z..

Answer:
-30

Question:
Solve -8 - 2 = 2*w for w..

Answer:
-5