question: Teacher asked me this: Solve -51*f = -42*f - 42 - 30 for f.
++++++++++
answer: 8

question: Teacher asked me this: Solve -47*x - 55 = 8*x for x.
++++++++++
answer: -1

question: Teacher asked me this: Solve 0 = -g + 12 - 8 for g.
++++++++++
answer: 4

question: Teacher asked me this: Solve -25*n = 19745 - 19920 for n.
++++++++++
answer:
7