question: Teacher asked me this: Solve 1524*p = 1539*p + 15 for p.
++++++++++
answer: -1

question: Teacher asked me this: Solve -111*q + 35 = 106*q + 252 for q.
++++++++++
answer: -1

question: Teacher asked me this: Solve 1076 = 100*x + 169*x for x.
++++++++++
answer: 4

question: Teacher asked me this: Solve 65*n + 111 - 241 = 0 for n.
++++++++++
answer:
2