Question:
Solve -216*f = -164*f - 52 for f..

Answer:
1

Question:
Solve 3503 = -59*l + 93 + 283 for l..

Answer:
-53

Question:
Solve 268*b - 3785 = -489*b for b..

Answer:
5

Question:
Solve 310 = -45*b + 40 for b..

Answer:
-6