question: Teacher asked me this: Solve -2*f = 3*f - f for f.
++++++++++
answer: 0

question: Teacher asked me this: Solve -v = 106 - 102 for v.
++++++++++
answer: -4

question: Teacher asked me this: Solve -16*y - 5070 = 12*y - 4790 for y.
++++++++++
answer: -10

question: Teacher asked me this: Solve 0 = 1311*b + 2569*b + 271600 for b.
++++++++++
answer:
-70