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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
clever way of using the and opperator.
I think this belongs to 5kyu. All mathy problemy thingys are 5kyus (except for hard ones, they are probably 4kyu). Cuz 3kyu is already machine learning (according to the official Codewars ranking system), which I think is harder than algebra like this.
CODERS BEWARE. This is nowhere near a 7 kyu. Closer to a 5 kyu maybe even a 3 kyu.
If there were hints to a formula in the description, this might be a 6 kyu, but I cannot find any resources online or formulas to plug this in to.
-CJ