An inequality has a range of solutions rather than a single value, so the answer is an interval.

• Solve exactly like an equation — with one exception.
• Multiplying or dividing by a NEGATIVE number reverses the inequality sign.
• Show the solution on a number line: open circle for < or >, closed circle for ≤ or ≥.
• Interval notation: x > 2 is (2; ∞), while −1 ≤ x < 4 is [−1; 4).

• Interval — a continuous set of solutions.
• Compound inequality — two conditions joined, e.g. −1 ≤ x < 4.