question: Teacher asked me this: Solve -9*r = -3*r - 12 for r.
++++++++++
answer: 2

question: Teacher asked me this: Solve 966 + 144 = -370*i for i.
++++++++++
answer: -3

question: Teacher asked me this: Solve 6*y - 905 = -857 for y.
++++++++++
answer: 8

question: Teacher asked me this: Solve -3*k + 7*k + 161 = 27*k for k.
++++++++++
answer:
7