Problema Solution
A bookkeeper bought 3 times as many books as magazines. She ordered a total of 108 books and magazines. How many books did she order.
Answer provided by our tutors
let b = number of books
m = number of magazines
b+m = 108
where b=3m
so 3m+m=108
4m=108
m=27
therefore b=3*27=81
there are 81 books and 27 magazines