question: Teacher asked me this: Solve -3*g + 28 = 4*g for g.
++++++++++
answer: 4

question: Teacher asked me this: Solve 31*o = 10*o - 21 for o.
++++++++++
answer: -1

question: Teacher asked me this: Solve 0 = -51*f + 2*f - 6*f + 1650 for f.
++++++++++
answer: 30

question: Teacher asked me this: Solve -25*b = -900 - 931 + 1506 for b.
++++++++++
answer:
13