Example

Example: Solving Absolute Value Equations Requiring Isolation

When an absolute value equation contains extra terms, apply algebraic properties to completely isolate the absolute value expression before splitting it into two equations. For example, to solve 2x7+5=92|x - 7| + 5 = 9, first subtract 55 from both sides to obtain 2x7=42|x - 7| = 4. Next, divide by 22 to yield the isolated equation x7=2|x - 7| = 2. Then, formulate the equivalent equations: x7=2x - 7 = -2 or x7=2x - 7 = 2. Solving each produces x=5x = 5 or x=9x = 9. Finally, substituting both values back into the initial equation verifies that both x=5x = 5 and x=9x = 9 are valid solutions.

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Updated 2026-05-02

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