question: Teacher asked me this: Solve -47*i = 2850 - 2850 for i.
++++++++++
answer: 0

question: Teacher asked me this: Solve 257*f - 857*f = 1290*f + 50*f - 195940 for f.
++++++++++
answer: 101

question: Teacher asked me this: Solve 50260 - 14024 = 2294*f + 1081*f - 65014 for f.
++++++++++
answer: 30

question: Teacher asked me this: Solve 220*v + 24*v = 1220 for v.
++++++++++
answer:
5