question: Teacher asked me this: Solve 399 = 5*n + 384 for n.
++++++++++
answer: 3

question: Teacher asked me this: Solve -69009 = -3889*i + 655*i + 56268 + 849 for i.
++++++++++
answer: 39

question: Teacher asked me this: Solve 98*f + 710 = -96*f + 123*f for f.
++++++++++
answer: -10

question: Teacher asked me this: Solve 139*c + 280*c = 364*c - 385 for c.
++++++++++
answer:
-7