question: Teacher asked me this: Solve -42*f + 535 + 485 = 9*f for f.
++++++++++
answer: 20

question: Teacher asked me this: Solve 405*b - 40*b + 7300 = 0 for b.
++++++++++
answer: -20

question: Teacher asked me this: Solve 51*m - 52*m = 0 for m.
++++++++++
answer: 0

question: Teacher asked me this: Solve -134*j - 9738 = -14294 for j.
++++++++++
answer:
34