question: Teacher asked me this: Solve -2851*n + 2879*n = 840 for n.
++++++++++
answer: 30

question: Teacher asked me this: Solve -46655 = -1129*u + 582*u - 786*u for u.
++++++++++
answer: 35

question: Teacher asked me this: Solve -14*u = -49*u - 5*u + 40 for u.
++++++++++
answer: 1

question: Teacher asked me this: Solve -18*b = -9*b + 18 for b.
++++++++++
answer:
-2