Linear Inequality Solver
Enter a linear inequality of the form mx + b OP c. The solver isolates x in the same way as a linear equation, but flips the inequality direction if it divides both sides by a negative number, and returns the solution as an interval.
Frequently asked questions
When does the inequality flip?
When you multiply or divide both sides by a negative number. The calculator handles this automatically when m is negative.
What if m = 0?
The variable disappears and the inequality reduces to a statement about constants — either always true (all real x) or always false (no solution).
What format is the answer in?
Both the inequality form (x < value) and the interval form ((−∞, value)) are given so you can pick whichever your problem set expects.