Question

What’s the work and answer? Please someone tell me

Answer 1

The price for the forth top is $93

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.