The student council raised $2,790 and they have to shared equally among 3 comittees, then:
[tex]\frac{2,790}{3}=930[/tex]Each commitee has a budget of $930, then for the sports committee that wants to purchase t-shirts and each t-shirt costs $12, we can create the following expression:
Let x be the greatest number of t-shirts
[tex]\begin{gathered} 12x=930 \\ x=\frac{930}{12} \\ x=77.5 \end{gathered}[/tex]Rounding, the sport commitee can purchase 77 t-shirts.