Question:
Solve 8491 = 1313*f - 12517 for f..

Answer:
16

Question:
Solve -498*c - 4333 = -97*c + 1281 for c..

Answer:
-14

Question:
Solve -52*g + 9*g + 86 = 0 for g..

Answer:
2

Question:
Solve 0 = 13*f - 38 + 129 for f..

Answer:
-7