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Question
If the replacement set is the set of odd natural numbers, then solve:
5x − 17 ≤ x + 9
Sum
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Solution
5x − 17 ≤ x + 9
⇒ 5x − x ≤ 9 + 17
⇒ 4x ≤ 26
⇒ x ≤ `26/4`
= 6.5
Use odd natural numbers ≤ 6.5
{1, 3, 5} ≤ 6.5
{1, 3, 5}
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