Answer:
Alejandro downloaded 7 videos.
Explanation:
Let
videos and
songs be downloaded.
Given:
Cost of 1 video = $ 5
∴ Cost of x videos =

Cost of 1 song = $ 1
∴ Cost of y songs =

Total cost for the downloads is $ 54.
So,
................. 1
Also, total number of downloads is 26.
So,
............... 2
Subtract equation 2 from 1, we get

Therefore, the number of videos downloaded are 7.