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### Course: 7th grade foundations (Eureka Math/EngageNY)>Unit 3

Lesson 2: Topic B: Foundations

# Inequality word problem: one variable

This time we're creating a variable to represent a number, and then writing an inequality. We're building on our knowledge. Created by Sal Khan.

## Want to join the conversation?

• Why when the circle is closed does it include the number?
• When the circle is closed it means it includes the number. If you asking why, well i guess that's how its defined.
• the karman line question just lost me
• Hello! We were given this math problem in class but my teacher said it's undefined. We were asked to put either a less than or greater than sign between x 2x
I put < sign because x is the same as 1x and 1x and is less than 2x. Am i wrong?
• Isn't the point from when you're not safe called the event horizon
• i want to know what is the definition of and inequality
• when do you know when to use the less than equal to or greater than equal
• At and how did Sal know that c is the Karman line?
• My page does not load on the sections where I have to answer the questions. Every section marked by a star, I am having difficulty loading. Can you help me?
• You don't really "solve" inequalities. Inequalities represent a set of allowed values. You can test a value and solve for whether it's true or not. So you could test for x equal to 7, and solving `x < 100` for 7 gives `7 < 100`, which is true. So 7 is included in the inequality for x.