Question:
Solve -31*b + 3 = -30*b for b..

Answer:
3

Question:
Solve 0 = 329*f + 219*f + 5480 for f..

Answer:
-10

Question:
Solve -958*k + 717 = 8381 for k..

Answer:
-8

Question:
Solve -2562 = 702*g + 10549 + 37998 - 4777 for g..

Answer:
-66