Answer:
Option A -

Explanation:
To find : Write an equation to represent : four-fifths of z added to six equals eight ?
Solution :
The expression is 'four-fifths of z added to six equals eight',
Write in number term by term,
four-fifths of z is

four-fifths of z added to six is

four-fifths of z added to six equals eight is

Therefore, The representation is

So, Option A is correct.