Key Concepts
- Word problems
- Algebraic expressions
Solution
We're given:
- 19 shirts in total
- f = folded
- n = not folded
To determine the number of shirts that have not yet been folded, we have the following equation:

If Omar had folded 9 shirts, we can solve for n given f = 9:

Answer
Therefore, Omar has 10 shirts left to fold.