question: Teacher asked me this: Solve 157*x - 82*x + 5979 = 804 for x.
++++++++++
answer: -69

question: Teacher asked me this: Solve -18*k + 12 = -15*k for k.
++++++++++
answer: 4

question: Teacher asked me this: Solve 6116 = 171*q - 204*q + 172*q for q.
++++++++++
answer: 44

question: Teacher asked me this: Solve 4*u = 5 - 5 for u.
++++++++++
answer:
0