Question:
Solve 0 = -434*i + 432*i + 8 for i..

Answer:
4

Question:
Solve -13*f = -20*f + 16*f + 54 for f..

Answer:
-6

Question:
Solve 0 = -2*v + 106 - 100 for v..

Answer:
3

Question:
Solve 18*s + 40*s = -880 + 68 for s..

Answer:
-14