Question:
Solve 39575*x - 69525 = 42150*x for x..

Answer:
-27

Question:
Solve -64 = 4*w - 68 for w..

Answer:
1

Question:
Solve -647 = 31*h - 146 + 212 for h..

Answer:
-23

Question:
Solve 878*s - 315*s = 307*s + 310*s - 972 for s..

Answer:
18