Jake owns twice as many dvds as Louis. Zack has 60 fewer dvds than 5 times Louis's collection. If Jake and Zack have the same amount of dvds, how many dvds in Louis's collection.
Let x be the number Louis has
The, since Jake and Zack have the same number, we have
2x = 5x - 60 subtract 2x from both sides, add 60 to both sides
60 = 3x divide by 3 on both sides
20 = x = the number that Louis has....
