question: Teacher asked me this: Solve 5 = 108*u - 109*u for u.
++++++++++
answer: -5

question: Teacher asked me this: Solve 14*d - 12 = 3*d - 12 for d.
++++++++++
answer: 0

question: Teacher asked me this: Solve -232*h = -288 + 4232 for h.
++++++++++
answer: -17

question: Teacher asked me this: Solve 4150*r + 258323 - 341323 = 0 for r.
++++++++++
answer:
20