Respuesta :

Peaceloving

Answer:

The price for the forth top is $93

Step-by-step explanation:

Let the price of the forth top = y

(30+15+18+y) / 4 = 39

(63+y) / 4 = 39

63+y = 39 x 4

63+y = 156

y = 156 - 63

y = 93

(30+15+18+39) / 4 = 39.

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