question: Teacher asked me this: Solve -15*s + 3*s - 9*s + 189 = 0 for s.
++++++++++
answer: 9

question: Teacher asked me this: Solve 224*w + 4673 + 127 = -96*w for w.
++++++++++
answer: -15

question: Teacher asked me this: Solve 7469*c + 24233 = 7147*c + 66737 for c.
++++++++++
answer: 132

question: Teacher asked me this: Solve 252*o = 41272 - 38752 for o.
++++++++++
answer:
10