question: Teacher asked me this: Solve -219*u + 1471*u - 16005 = -4737 for u.
++++++++++
answer: 9

question: Teacher asked me this: Solve -4*d + 9*d = 5 for d.
++++++++++
answer: 1

question: Teacher asked me this: Solve 55 = 9*h + 145 for h.
++++++++++
answer: -10

question: Teacher asked me this: Solve -15 - 309 = 65*i + 66 for i.
++++++++++
answer:
-6