question: Teacher asked me this: Solve w - 2*w = -5 for w.
++++++++++
answer: 5

question: Teacher asked me this: Solve -18 + 6 = 3*r for r.
++++++++++
answer: -4

question: Teacher asked me this: Solve 7*n + 12214 = 401*n for n.
++++++++++
answer: 31

question: Teacher asked me this: Solve -22*n - 127 - 27 = 0 for n.
++++++++++
answer:
-7