Question:
Solve 252 = 132*q - 90*q for q..

Answer:
6

Question:
Solve -155 + 268 = -66*q - 547 for q..

Answer:
-10

Question:
Solve -4429 + 11320 = -462*f - 16671 for f..

Answer:
-51

Question:
Solve -13398 + 21822 = -648*q for q..

Answer:
-13