question: Teacher asked me this: Solve 1 = -k + 4 for k.
++++++++++
answer: 3

question: Teacher asked me this: Solve 138*q - 39*q + 3230 = -71*q for q.
++++++++++
answer: -19

question: Teacher asked me this: Solve 1106*u + 50081 - 35273 = -41598 for u.
++++++++++
answer: -51

question: Teacher asked me this: Solve 306*b = -67*b - 199*b + 10868 for b.
++++++++++
answer:
19