For this case, the first thing you should do is define a variable.
We have then:
x: number of passengers remaining who can board the plane.
We have as data:
1) They can board up to 149 passengers
2) There are 96 passengers currently aboard.
Writing inequality we have:
Answer:
An inequality that can be used to determine how many more people can board is:
![x + 96 \leq 149](https://img.qammunity.org/2019/formulas/mathematics/college/yn99xv14sclpqsa9ahn2atmaz531an32mt.png)