Question:
Solve -2573 = 381019*c - 383592*c for c..

Answer:
1

Question:
Solve -20967 - 4457 = 3632*i for i..

Answer:
-7

Question:
Solve 6 - 12 = -3*d for d..

Answer:
2

Question:
Solve 642*i + 127614 = 31956 for i..

Answer:
-149