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Solve 5 (x - 2) >= 15, then x belongs to
A{x : x <= 3} only
B{x : x <= 5} only
C{x : x >= 3} only
D{x : x >= 5}
Answer & Solution
Correct answer: D. {x : x >= 5}
1. Divide both sides by 5: x - 2 >= 3.
2. Add 2: x >= 5.
3. Sign does not flip.
4. So x >= 5.
_Source: Selina Concise Mathematics Class 10, Ch 4 Linear Inequations in One Variable (Mistral OCR'd PDF), section on bracket solving_
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