Problema Solution
john and emily bought school supplies. john spent 10.90 on 5 notebooks and 5pen. emily spent 7.30 on 4 notebooks and 2 pens. what is the cost of 1 notebook and what is the cost of 1 pen?
Answer provided by our tutors
let
n = the cost of 1 notebook
p =the cost of 1 pen
john spent 10.90 on 5 notebooks and 5 pens:
5n + 5p = 10.90
emily spent 7.30 on 4 notebooks and 2 pens:
4n + 2p = 7.30
by solving the system of equations:
5n + 5p = 10.90
4n + 2p = 7.30
we find:
n = $1.47
p = $0.71
click here to see the step by step solution of the system of equations:
the cost of 1 notebook is $1.47.
the cost of 1 pen is $0.71.