# Example 3

- Author:
- Walch Education

- Topic:
- Mathematics

Kamal bought 30 baseball cards worth $1.50 each and 15 basketball cards worth $1.75 each. When he went to count his cards today, he discovered he had lost

*s*baseball cards and*t*basketball cards. Write a simplified expression for the total value in dollars of all the cards Kamal has left.