question: Teacher asked me this: Solve -309*a - 1415 = 268*a + 8394 for a.
++++++++++
answer: -17

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

question: Teacher asked me this: Solve 13*i + 25*i - 190 = 0 for i.
++++++++++
answer: 5

question: Teacher asked me this: Solve 47*q - 19*q = 28 for q.
++++++++++
answer:
1