Be a part of our community of 1M+ users who develop and demonstrate their skills on CodeSignal
5 courses
112 practices
7 hours
Master the algebraic solution of linear inequalities. You will learn to interpret symbols, solve multi-step problems, and represent ranges on number lines and in interval notation. Apply these skills to real-world scenarios like budgeting, pricing comparisons, and threshold alerts.
You'll discover what inequality symbols really mean and how to compare quantities with confidence. You'll translate everyday phrases like "at least" and "no more than" into symbols, test whether a value fits a range, and learn to both draw and read inequalities on a number line.
You'll start solving inequalities the same way you solve equations, using inverse operations to isolate the variable. You'll master the one rule that makes inequalities different — flipping the sign for negatives — handle the variable landing on either side, and confidently solve any one-step inequality in any form.
You'll extend your one-step skills to inequalities that need several moves first. You'll combine like terms, expand parentheses, handle variables on both sides, and learn to read the unusual results that mean every number works or no number does.
You'll express inequality solutions in several connected ways. You'll write interval notation, move fluently between inequalities, number lines, and intervals, and interpret what a solution means in everyday situations.
You'll tackle inequalities built from two conditions joined by "and" or "or," and see how each connective shapes a different solution set. You'll solve both types, including three-part chained inequalities, and show your solutions on a number line and in interval notation.
Hear what our customers have to say about CodeSignal Learn
I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!
Francisco Aguilar Meléndez
Data Scientist
+11
I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.
Faith Yim
Software Engineer
+14
It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.
Alex Bush
Full Stack Engineer
+9
I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.
Abbey Helterbran
Tech consultant
+8
I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.
Jonathan Miller
Senior Machine Learning Engineer
+12
I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!
