Inequality Solver
Solve linear inequalities in x step by step. Enter the coefficients and choose the inequality sign, and get the solution set in interval notation plus a number line plot showing exactly where the inequality holds.
How to use
- Enter a, b, c and the sign.
- When you divide by a negative number the sign flips — this step is shown clearly.
- See where the solution sits on the number line.
Tips
- When you divide or multiply both sides by a negative number, the inequality sign flips - this tool shows that step explicitly, so study it.
- If the coefficient of x is 0, the inequality has no solution or infinite solutions; the tool tells you which.
- Read the interval notation carefully: round brackets mean the endpoint is excluded, square brackets mean included.
- Use the number line to double-check: pick one value inside the shaded region and test it in the original inequality.
Note: If a = 0, the inequality is either always true (infinite solutions) or never true — the result will say which one.