question: Teacher asked me this: Solve 0 = 439*u + 529*u + 151*u - 87*u + 20640 for u.
++++++++++
answer: -20

question: Teacher asked me this: Solve -2152 - 510 = -121*t for t.
++++++++++
answer: 22

question: Teacher asked me this: Solve -16185 = 66*b - 14469 for b.
++++++++++
answer: -26

question: Teacher asked me this: Solve -9*s = -8*s + 2 for s.
++++++++++
answer:
-2