Ben had 1/5 as many books as Jann. After Jann gave Ben 4 books, Ben had 1/3 as many books as Jann. How many books did Jann have in the end?

Guest Apr 19, 2021

#1

#10**+2 **

Given b = 1/5 j

b+4 = 1/3 ( j -4) sub in the red equation

1/5j + 4 = 1/3 ( j-4)

1/5 j + 4 = 1/3 j - 4/3

3/15 j + 4 = 5/15 j - 4/3

-2/15 j = -4 - 4/3

j = 40 initially she gives away 4 to have 36 left

ElectricPavlov Apr 19, 2021