question: Teacher asked me this: Solve 320*f - 630*f = -328*f + 72 for f.
++++++++++
answer: 4

question: Teacher asked me this: Solve 63*k + 606 + 1213 = 559 for k.
++++++++++
answer: -20

question: Teacher asked me this: Solve -5*b + 51202 = 51127 for b.
++++++++++
answer: 15

question: Teacher asked me this: Solve 0 = -w + 6 - 1 for w.
++++++++++
answer:
5