Question:
Solve -430*u - 2775095 + 2805625 = 0 for u..

Answer:
71

Question:
Solve 3*f + 1995 = 2*f + 2003 for f..

Answer:
8

Question:
Solve 0 = -3*q + 39 - 75 for q..

Answer:
-12

Question:
Solve -d + 29 - 78 = -40 for d..

Answer:
-9