Respuesta :

Nikki = y

Charlie = 8 + y

Dylan = 1/4(8 + y)

Explanation:

let the number apps on Nikki's cell = y

Charlie has 8 more apps than Nikki:

Charlie = 8 + y

Dylan has one fourth as many apps as Charlie

Dylan = 1/4(charlie's app)

Dylan = 1/4(8 + y)

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