Question:
Solve 3664 = -3*c + 13*c + 3514 for c..

Answer:
15

Question:
Solve 0 = -25*f - 15 - 185 for f..

Answer:
-8

Question:
Solve -480 = -2888*f + 2918*f for f..

Answer:
-16

Question:
Solve -174*v - 30*v + 753 + 1695 = 0 for v..

Answer:
12