Inequality Calculator
Solve one-variable linear inequalities in the form ax + b < c. See the solution, interval notation, number-line graph, and clear step-by-step working.
Enter your inequality
3x + 6 < 18
3x < 12
x < 4
Solution
How to solve a linear inequality
Subtract the constant from both sides.
Divide both sides by the coefficient of x.
Flip the inequality sign when dividing by a negative number.
Frequently asked questions
What is an inequality?
An inequality compares two expressions using symbols such as <, ≤, >, or ≥ instead of an equals sign.
Why does the inequality sign sometimes reverse?
The sign reverses whenever both sides are multiplied or divided by a negative number.
What does an open circle mean?
An open circle means the boundary value is not included. A filled circle means it is included.
Results are estimates generated locally in your browser using standard mathematical formulas. They are for informational and educational purposes only and are not a substitute for verification in coursework, examinations or professional contexts requiring certified accuracy. VisionVix accepts no liability for decisions based on this tool's output.
