Question

At a school supply store, binders cost $5 and pencil pouches cost $2. In one day, 42 of these items are sold for total sales of $144. Which system represents this (b represents binders and p represents pencil pouches), and how many binders were sold?
A.
b + p = 144
5b + 2p = 42
82 binders
B.
b + p = 42
2b + 5p = 144
22 binders
C.
b – p = 42
2b + 5p = 144
26 binders
D.
b + p = 42
5b + 2p = 144
20 binders