Problema Solution
Barry bought a book, a magazine and a pen for a total of $14.75 before tax. The book was 4 times as expensive as the magazine, and the pen was $5.50 less than the book. What was the price of the book?
Answer provided by our tutors
let
b = the price of the book
m = the price of the magazine
p = the price of the pen
Barry bought a book, a magazine and a pen for a total of $14.75 before tax
p + b + m = 14.75
the book was 4 times as expensive as the magazine
b = 4m
the pen was $5.50 less than the book
p = b - 5.50
by solving the system of equations
p + b + m = 14.75
b = 4m
p = b - 5.50
we find
p = $3.5
b = $9
m = $2.25
click here to see the step by step solution of the system of equations
the pen is $3.5.
the book is $9.
the magazine is $2.25.