Question:
Solve 0 = -4*w - 0*w + 20 for w..

Answer:
5

Question:
Solve 10 - 6 = 4*b for b..

Answer:
1

Question:
Solve 59*u - 175*u - 86037 + 94469 = 156*u for u..

Answer:
31

Question:
Solve 0*c + 24*c - 1254 = -185*c for c..

Answer:
6