question: Teacher asked me this: Solve 0 = -1670*k - 2266*k - 122016 for k.
++++++++++
answer: -31

question: Teacher asked me this: Solve 617 = 30*y + 647 for y.
++++++++++
answer: -1

question: Teacher asked me this: Solve -360697*x = -360798*x - 404 for x.
++++++++++
answer: -4

question: Teacher asked me this: Solve 0 = 4*r + 23 - 19 for r.
++++++++++
answer:
-1