Question:
Solve 637*d = -128*d - 13005 for d..

Answer:
-17

Question:
Solve -291*x - 3 = -283*x - 35 for x..

Answer:
4

Question:
Solve 562*u + 4369 = -112*u + 31*u + 38448 for u..

Answer:
53

Question:
Solve 800 - 424 = -39*q + 532 for q..

Answer:
4