question: Teacher asked me this: Solve -7*k = 5*k - 12 for k.
++++++++++
answer: 1

question: Teacher asked me this: Solve -17 = 13*l + 178 for l.
++++++++++
answer: -15

question: Teacher asked me this: Solve 359*b + 156 = 307*b for b.
++++++++++
answer: -3

question: Teacher asked me this: Solve 19*w - 102 = 12 for w.
++++++++++
answer:
6