On the first day of school, the school bookstore sold 348 notebooks, some at 25¢ each and the rest at 38¢ each. The total amount of money paid for the notebooks was $100.91. How many of each kind were sold?
241 of the 25¢ notebook
107 of the 38¢ notebook
1) Let x = no. of 25¢ notebooks sold and y = no. of 38¢ notebooks sold
2) Total notebooks sold: x + y = 348
3) Revenue from the notebooks: 0.25x + 0.38y = 100.91
4) Substitute one equation to the other and solve for a single variable (either x or y)
