question: Teacher asked me this: Solve -7*k + 152 = -42*k - 3*k for k.
++++++++++
answer: -4

question: Teacher asked me this: Solve 12728*f = 12764*f - 216 for f.
++++++++++
answer: 6

question: Teacher asked me this: Solve -13086 = 98*j + 2083*j for j.
++++++++++
answer: -6

question: Teacher asked me this: Solve 111*f = -20*f - 3173 + 684 for f.
++++++++++
answer:
-19