Problema Solution
In Warren's stationery store, Shannon paid $2.55 for 9 folders and 4 pencils. Tyler paid $2.00 for 4 folders and 9 pencils. How much does 1 folder and 1 pencil cost at Warren's stationery store?
Answer provided by our tutors
let 'f' represent the cost for a folder and let 'p' represent the cost for a pencil
the following system of equations should be solved:
9f + 4p = 2.55
4f + 9p = 2.00
click here to solve for the cost of each pencil and each folder
f=0.23
p=-0.12
So each folder costs 23 cents (0.23) and each pencil costs 12 cents (0.12).