inequality that models a real-world situation. Describe your situation and what the variable x represents.
Here is one example:
You have $20 and oranges cost $3 each. At the counter, you decide to order a magazine worth $2. How many oranges can you buy?
If x is the number of oranges, then 3x + 2 <= 20.
This is by no means the only example that can be used. A Google search would likely reveal more than enough examples to reference.