question: Teacher asked me this: Solve -40*f + 525 = 20*f + 15*f for f.
++++++++++
answer: 7

question: Teacher asked me this: Solve 243 = -31*y + 350 + 761 for y.
++++++++++
answer: 28

question: Teacher asked me this: Solve -10 = -3*w + 11 for w.
++++++++++
answer: 7

question: Teacher asked me this: Solve -181 = 23*s + 476 + 10 for s.
++++++++++
answer:
-29