question: Teacher asked me this: Solve -81*c - 476 - 826 = -19*c for c.
++++++++++
answer: -21

question: Teacher asked me this: Solve -7943*s = -7665*s + 15012 for s.
++++++++++
answer: -54

question: Teacher asked me this: Solve 0 = -4*f + 47 - 35 for f.
++++++++++
answer: 3

question: Teacher asked me this: Solve 5*p - 2*p = 0 for p.
++++++++++
answer:
0