question: Teacher asked me this: Solve -29*d = -172 + 94 - 415 for d.
++++++++++
answer: 17

question: Teacher asked me this: Solve 10*b + 19 = -71 for b.
++++++++++
answer: -9

question: Teacher asked me this: Solve -18*f = 47*f - 883 - 287 for f.
++++++++++
answer: 18

question: Teacher asked me this: Solve 0 = 72*x - 0 + 15 + 57 for x.
++++++++++
answer:
-1