Question:
Solve -207 = 15*f - 409 + 127 for f..

Answer:
5

Question:
Solve -52 = 3*t - 58 for t..

Answer:
2

Question:
Solve -25*d - 3*d = -67548 + 67716 for d..

Answer:
-6

Question:
Solve 52*t - 448 = 28*t - 88*t for t..

Answer:
4