Alright! I'm assuming we're simplifying. So, in order to get your answer you have to distribute your coefficient. (Multiplying the outside by what's inside)
(4/5 x 20) = 16
and
(4/5 x 10) = 8
[Note: You do not have to multiply 4/5 by x since it is a variable to 20.]
The answer is (16x - 8)
