question: Teacher asked me this: Solve 13 = -2*z + 7 for z.
++++++++++
answer: -3

question: Teacher asked me this: Solve -1215*f + 16440 = 735*f - 3060 for f.
++++++++++
answer: 10

question: Teacher asked me this: Solve 0 = -6074*v - 4385*v + 773966 for v.
++++++++++
answer: 74

question: Teacher asked me this: Solve -1616*k - 576 = -1592*k for k.
++++++++++
answer:
-24