question: Teacher asked me this: Solve 9*k - 28 = 2*k for k.
++++++++++
answer: 4

question: Teacher asked me this: Solve -49*u - 6 = -46*u for u.
++++++++++
answer: -2

question: Teacher asked me this: Solve 22*u - 164 = -19*u for u.
++++++++++
answer: 4

question: Teacher asked me this: Solve 60*i - 210 = 25*i for i.
++++++++++
answer:
6