Question:
Solve 3*q - 9*q = 3*q + 36 for q..

Answer:
-4

Question:
Solve -890*a - 14873 = 6487 for a..

Answer:
-24

Question:
Solve 33*l = 60*l + 162 for l..

Answer:
-6

Question:
Solve -14*f + 243 = -9 for f..

Answer:
18