question: Teacher asked me this: Solve 109*t + 12768 = -563*t for t.
++++++++++
answer: -19

question: Teacher asked me this: Solve 0 = 21097*i - 21071*i + 546 for i.
++++++++++
answer: -21

question: Teacher asked me this: Solve -18*i - 13*i + 26*i = -105 for i.
++++++++++
answer: 21

question: Teacher asked me this: Solve -141*o = 642 + 593 - 107 for o.
++++++++++
answer:
-8