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Question
Solve −2x ≥ 9 when x is a natural number
Solution
Given – 2x ≥ 9
⇒ `- x ≥ 9/2`
⇒ `x ≤ - 9/2`
x is a natural number
`x ≤ – 9/2`
x ≤ – 4.5
Since there exists no natural number less than `- 9/2`
∴ No solution
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