goodwill calculation

I see on EOC that goodwill is calculated from balance sheet by using the difference between total equity and purchase price, maybe I forgot the accounting 101, but can someone explain to me how total equity is the same in defition of net identifable asset?

A = L + E

So,

E = A − L

ah i guess what you meant is i didnt get clear with the idea aof net identifiable asset, which is asset minus liability which is equity, correct?

Yup.