We will use division operator to solve this word problem. Division operator is used when the problem asks for 'one,' 'each,' or 'per'.
Total amount to buy CDs for friends party = $90
Cost of each CD = $18
The possible numbers of CDs that can be bought is calculated by dividing $90 by $18.
=
![\$ 90 / \$18](https://img.qammunity.org/2019/formulas/mathematics/college/ndyexemubj0okan9qpn5vzo8hfmy8deu02.png)
=
![(90)/(18)](https://img.qammunity.org/2019/formulas/mathematics/college/b4le3p5dma3tnqhog3pnyksikyn18j0sdm.png)
= 5 CDs