question: Teacher asked me this: Solve -15 = 9*s - 12*s for s.
++++++++++
answer: 5

question: Teacher asked me this: Solve 9*w = 48*w - 156 for w.
++++++++++
answer: 4

question: Teacher asked me this: Solve 6*l - 18 = -3*l for l.
++++++++++
answer: 2

question: Teacher asked me this: Solve 3104*a = 29632 + 5046 + 9135 + 5851 for a.
++++++++++
answer:
16