Finding Notebooks and Pens

Samantha has $15 to spend on notebooks and pens. Each notebook costs $3 and each pen costs $2. The following system of equations represents the situation:

$$x + y = 15$$

$$3x + 2y = 15$$

Where $x$ denotes the number of notebooks and $y$ denotes the number of pens. How many notebooks and pens can Samantha buy if she spends her entire budget?