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As I was going to St. Ives,

I met a man with seven wives,

Each wife had seven sacks,

each sack had seven cats,

Each cat has seven kits: kits, cats, sacks and wives,

How many were going to St. Ives?

I would like to put a different twist to this riddle. If we let x represent people and cats (including kittens), how would you represent the answer to this question – how many were NOT going to St. Ives? Also solve the equation for the number of people and cats.