question: Teacher asked me this: Solve 0 = 7*s - 33*s - 130 for s.
++++++++++
answer: -5

question: Teacher asked me this: Solve 2646 - 21618 = 612*n for n.
++++++++++
answer: -31

question: Teacher asked me this: Solve -5*p = p - 48 for p.
++++++++++
answer: 8

question: Teacher asked me this: Solve 39*a - 50*a + 143 = 0 for a.
++++++++++
answer:
13