question: Teacher asked me this: Solve 11*c = 8*c for c.
++++++++++
answer: 0

question: Teacher asked me this: Solve 16*r - 74 + 10 = 0 for r.
++++++++++
answer: 4

question: Teacher asked me this: Solve 223*n + 25441 = 23657 for n.
++++++++++
answer: -8

question: Teacher asked me this: Solve 23*r + 30 = 17*r for r.
++++++++++
answer:
-5