Christine sold 24 t-shirts at festival
Solution:
According to Question, Christine sold the t- shirts at $4 each and she earned a profit of $71 and his total expenses were $25
Let the total number of t- shirts sold by Christine be "x"
Profit = Selling price – Expenses
Selling price is given as:
![\text { Selling price }=\text { total number of shirts sold } * \text { price of each } \mathrm{t}-\text { shirt }](https://img.qammunity.org/2020/formulas/mathematics/middle-school/o0ctofe1q2jax2k4zzzu65tbhkin40knrb.png)
![\text { selling price }=n * 4](https://img.qammunity.org/2020/formulas/mathematics/middle-school/khp2obib9yxnql0ixo36x2k9ana6zhjpgk.png)
![\begin{array}{l}{71=(n * 4)-25} \\\\ {71+25=n * 4} \\\\ {96=n * 4} \\\\ {n=24}\end{array}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/e7t6gsid8js13ffksv6wtn6yjz2yl3664k.png)
So, the number of t- shirts sold by Christine are 24