question: Teacher asked me this: Solve -15*s + 6218 = 6413 for s.
++++++++++
answer: -13

question: Teacher asked me this: Solve 3*s - 44 = -35 for s.
++++++++++
answer: 3

question: Teacher asked me this: Solve -966*h = -768*h + 3168 for h.
++++++++++
answer: -16

question: Teacher asked me this: Solve 0 = 13*s - 2*s for s.
++++++++++
answer:
0