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Solve for x: |(3x + 4)/3| = 7.
- x = 17/3 or x = -25/3
- x = 7/3 or x = -7/3
- x = 17/3 only
- x = 25/3 or x = -17/3
Correct answer: x = 17/3 or x = -25/3
Solution
The modulus equation gives two linear equations; solve each for x.
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