Question:
Solve 535*a = 499*a - 108 for a..

Answer:
-3

Question:
Solve 7674 + 923 + 20509 + 11550 = 1452*l for l..

Answer:
28

Question:
Solve 0 = -2611*f + 2588*f - 437 for f..

Answer:
-19

Question:
Solve 292853 = -8134*z - 113847 for z..

Answer:
-50