question: Teacher asked me this: Solve 45 = -4*o + 53 for o.
++++++++++
answer: 2

question: Teacher asked me this: Solve 4*o + o = -10 for o.
++++++++++
answer: -2

question: Teacher asked me this: Solve -39*r + 47*r + 8 = 0 for r.
++++++++++
answer: -1

question: Teacher asked me this: Solve -6349 = 12*n - 6469 for n.
++++++++++
answer:
10