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Solve the equation |2x - 5| = 7 for x.
- x = 6 or x = -1
- x = 6 or x = 1
- x = -6 or x = 1
- x = 6 only
Correct answer: x = 6 or x = -1
Solution
Remove the modulus by considering both sign cases of (2x - 5), then solve each linear equation.
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