1 answer
(click or scroll down)
Let's say the number of playlists on Ashley's app is x
The number of playlists on Liam's app is 4x (4 times the number on Ashley's app)
The total number of playlists on both apps is x + 4x = 5x
The problem states that the total number of playlists is at least 45, so we have:
5x >= 45
Dividing both sides by 5, we get:
x >= 9
The solution set for x, representing the number of playlists on Ashley's app, is x >= 9.