question: Teacher asked me this: Solve 97*p + 2143 = 106 for p.
++++++++++
answer: -21

question: Teacher asked me this: Solve 0 = -29*r + 10*r - 38 for r.
++++++++++
answer: -2

question: Teacher asked me this: Solve 4*f = 9 - 17 for f.
++++++++++
answer: -2

question: Teacher asked me this: Solve 5*o + 9*o = -71*o - 25*o for o.
++++++++++
answer:
0