Scenario 1: The cook at Sam's Diner made 19 quiches today. This is 1 more than 3 times the number of quiches he
made yesterday. How many quiches did he make yesterday?
Scenario 2: Javier buys four dozen eggs. He saves $1.50 by
using a coupon. The total he pays is $8.50. What was the
cost of a dozen eggs without the coupon?
Scenario 3: Lina ate of a quiche for lunch. Each of her
two sisters split another piece equally. The three ate a total
of of the quiche. What fraction of the quiche did each of
Lina's sisters eat?