question: Teacher asked me this: Solve 0 = -36*a + 26*a + 40 for a.
++++++++++
answer: 4

question: Teacher asked me this: Solve 28 = -5*v + 38 for v.
++++++++++
answer: 2

question: Teacher asked me this: Solve 99 = 14*x + 197 for x.
++++++++++
answer: -7

question: Teacher asked me this: Solve 2559 = 117*i + 804 for i.
++++++++++
answer:
15