question: Teacher asked me this: Solve w + 6*w - 7 = 0 for w.
++++++++++
answer: 1

question: Teacher asked me this: Solve -8020*a = -8045*a + 375 for a.
++++++++++
answer: 15

question: Teacher asked me this: Solve -39 = -1229897*s + 1229884*s for s.
++++++++++
answer: 3

question: Teacher asked me this: Solve -5*c + 10*c + 5 = 0 for c.
++++++++++
answer:
-1