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Please help me understand this equation from the Article. | Reply
Hello Guys, I was hoping you'd help me with something.

Right after the explanations about Permutations and Combinations, there's a paragraph that says:

it is useful to know that

<img src="">
is also the number of integer solutions to this equation:

<img src="">

Could someone please explain to me this equation? How do I read it in natural language?

I have a particular problem with everything on the right side of the equals sign. :)

Thank you in advance for all the help..