books read by Ben ----- x
books read by Keisha --- 2x
Sheldon ------ (2x-4)/2
(2x-4)/2 = 10
2x-4 = 20
2x = 24
x = 12
Ben read 12 books
Keisha --- 24
Sheldon: (24-4)/2 = 10
Keisha read twice as many books this year as ben read. subtracting 4 from the number of books Keisha read and dividing by 2 gives the number of books Sheldon read. Sheldon read 10 books. How many books did Ben read?
1 answer