question: Teacher asked me this: Solve -l + 69 = 74 for l.
++++++++++
answer: -5

question: Teacher asked me this: Solve 17 - 12 + 0 = i for i.
++++++++++
answer: 5

question: Teacher asked me this: Solve -12757*r + 12760*r - 27 = 0 for r.
++++++++++
answer: 9

question: Teacher asked me this: Solve -328*r + 340*r + 36 = 0 for r.
++++++++++
answer:
-3