Jessica sold t-shirts at a festival. She made 3 for each t-shirt she sold. Her expenses were 27. If she made a profit of 51, how many t-shirts did she sell?
Let x be the number of t-shirts Jessica sold.
Her revenue from selling t-shirts is 3x (the profit she made on each t-shirt sold).
Her total profit is 3x - 27.
As given, her profit was 51.
Therefore, 3x - 27 = 51
3x = 78
x = 26
Jessica sold 26 t-shirts at the festival.