question: Teacher asked me this: Solve 0 = 15*i - 27 - 63 for i.
++++++++++
answer: 6

question: Teacher asked me this: Solve -590699 - 187388 = -13760*i + 88793 for i.
++++++++++
answer: 63

question: Teacher asked me this: Solve 0 = 14*s - 12 + 26 for s.
++++++++++
answer: -1

question: Teacher asked me this: Solve -67*a - 8901 = -61*a - 213*a for a.
++++++++++
answer:
43