My Three Dogs

     My neighbor has three pets in his home, all dogs. Fifi is the little French poodle. The name of his big St. Bernard is Maxx. And, Sparky, the medium-sized dog, is, well, let's just say, he is of no particular breed.

     Last week he took his beloved pets to the vet for their annual health check-ups and shots. The doctor weighed them as part of the examination. Upon returning home, my friend told me the animals' weights in an unusual way. He said:

     Tell me now how much each dog weighs, individually.

     Extra: Write an expression for the arithmetic mean of the dogs' weights. Use the same variables you chose for the main problem.


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