Question:
Solve 2397*s - 1212*s = 1356*s + 6840 for s..

Answer:
-40

Question:
Solve 8*f - 6 = 5*f for f..

Answer:
2

Question:
Solve 78 + 80 = -3*s + 134 for s..

Answer:
-8

Question:
Solve 7*v = -42*v + 245 for v..

Answer:
5