Given:
The amount that Isabella can spend on shirt is $45.
The price of one shirt is $5.
Explanation:
If Isabella can buy x shirts then price of x shirts is,
[tex]5x[/tex]The the cost of shirt is equal to $45. So,
[tex]5x=45[/tex]Simplify the equation for x.
[tex]\begin{gathered} \frac{5x}{5}=\frac{45}{5} \\ x=9 \end{gathered}[/tex]So, Isabella can buy 9 shirts.