As you mentioned above, abc stands for three sides, and n is a coefficient. In mathematical problems, there must be a representative meaning or a numerical value. If you don't see the meaning, then you haven't understood the meaning of the topic. I suggest watching it several times.
If you regard adcn as uncertain, there is no solution.
Sometimes things are very simple, you don't need to look at it as complicated, but you have entered a dead end. All you have to do is turn it out.