question: Teacher asked me this: Solve 0 = -400*q - 471*q + 9581 for q.
++++++++++
answer: 11

question: Teacher asked me this: Solve -11068 = -834*r + 3944 for r.
++++++++++
answer: 18

question: Teacher asked me this: Solve 207 = -3*x + 222 for x.
++++++++++
answer: 5

question: Teacher asked me this: Solve 365*u + 211 = -228*u - 7498 for u.
++++++++++
answer:
-13