Deandre sold t-shirts and hats at a festival. His total profit was $93. He made a $3 profit for each t-shirt he sold. He also made a profit of $45 from selling hats. How many t-shirts did he sell? (a) Write an equation that could be used to answer the question above. First, choose the appropriate form. (b) Solve the equation in part (a) to find the number of t-shirts.