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### Course: Algebra (all content)>Unit 2

Lesson 14: One-step inequalities

# Inequalities using addition and subtraction

Inequalities Using Addition and Subtraction. Created by Sal Khan and CK-12 Foundation.

## Want to join the conversation?

• What does inequality mean? I know it is dumb to ask but I don't understand this kind of stuff. Thanks to Khan Academy for all the help they have given me this year. Me, my friends and my family have learned a lot. THANKS!
• An inequality is an expression that includes < > ≤ ≥ and sets up a scenario where the two terms on either side of the expression are not equal (hence inequality).
• so the "<" and ">" when the pointy parts points to the number it means smaller than the other number?
• That's a good way to remember.
The way I remembered is that the big opening points towards the bigger number.
• At why the sign didn't switch?
• at he says it could be a googol how many zeros/digits is that?
• And googolplex is a 1 with google zeros after it!
• This is so confusing? When will we use this in the real would, I am genuinely asking.
• I still don't understand how to graph it on a number line. Can anyone help me>?
• but if it says it must be less than 35, wouldn't the limit be 39?
• I know how to do this, but my question is how to add or subtract inequalities themselves. Ex) 8>2x + 6x-5<14