Respuesta :

6f - 5 + 3f = 149.55
9f - 5 = 149.55
5f = 149.55 + 5
9f = 154.55
f = 154.55 / 9
f = 17.172 rounds to $ 17.17 per fish
Sophos
you were close, but I think you thought that after buying 6 fishes, it would be $5 off. I think that for each fish, it is $5 off, with 6 fishes the maximum. 

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