question: Teacher asked me this: Solve 40*y = -13*y + 371 for y.
++++++++++
answer: 7

question: Teacher asked me this: Solve 20*b - 74 - 106 = 0 for b.
++++++++++
answer: 9

question: Teacher asked me this: Solve -11*f - 7 = -4*f for f.
++++++++++
answer: -1

question: Teacher asked me this: Solve -12 + 31 = 19*o for o.
++++++++++
answer:
1