question: Teacher asked me this: Solve -105*p + 169*p = -1728 for p.
++++++++++
answer: -27

question: Teacher asked me this: Solve 1007*c = 1732*c + 19575 for c.
++++++++++
answer: -27

question: Teacher asked me this: Solve -5*r = 8*r - 13 for r.
++++++++++
answer: 1

question: Teacher asked me this: Solve -413*a - 954*a + 32832 = -455*a for a.
++++++++++
answer:
36