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Compound Inequalities with No Solution
When solving a compound inequality joined by the word "and", the final solution must consist of the numbers that satisfy both inequalities simultaneously. This is geometrically represented by the intersection of their individual graphed solution regions on the number line. However, if the two resulting inequalities point in opposite directions and do not overlap at all—for example, and —there are no values that can be in both sets at the same time. This scenario forms a logical contradiction. Consequently, the compound inequality has no solution.
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Updated 2026-05-02
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Algebra