question: Teacher asked me this: Solve 2*w - 6*w - 12 = 0 for w.
++++++++++
answer: -3

question: Teacher asked me this: Solve -39*h + 99 = -50*h for h.
++++++++++
answer: -9

question: Teacher asked me this: Solve -186 = -507*x + 569*x for x.
++++++++++
answer: -3

question: Teacher asked me this: Solve 28 = -156*i + 149*i for i.
++++++++++
answer:
-4