question: Teacher asked me this: Solve 4*y = 12*y + 40 for y.
++++++++++
answer: -5

question: Teacher asked me this: Solve -427*f + 5880 = -707*f for f.
++++++++++
answer: -21

question: Teacher asked me this: Solve -30*c + 16*c - 28 = 0 for c.
++++++++++
answer: -2

question: Teacher asked me this: Solve 360*g = -123*g - 43*g - 10520 for g.
++++++++++
answer:
-20