question: Teacher asked me this: Solve 404*f - 2761 - 6689 = -46*f for f.
++++++++++
answer: 21

question: Teacher asked me this: Solve -99*f + 96*f = 0 for f.
++++++++++
answer: 0

question: Teacher asked me this: Solve 30082 = 532*b + 1121*b - 9590 for b.
++++++++++
answer: 24

question: Teacher asked me this: Solve -325 = -44*x + 2186 - 267 for x.
++++++++++
answer:
51