question: Teacher asked me this: Solve -17877*c + 17758*c - 2499 = 0 for c.
++++++++++
answer: -21

question: Teacher asked me this: Solve 1054 = 133*o + 497 - 1438 for o.
++++++++++
answer: 15

question: Teacher asked me this: Solve 0 = -25*r - 36*r + 671 for r.
++++++++++
answer: 11

question: Teacher asked me this: Solve 1 = 23*f + 70 for f.
++++++++++
answer:
-3