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Sum
Solve the inquation 8 – 2x ≥ x – 5; x ∈ N.
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Solution
8 – 2x ≥ x – 5; x ∈ N.
⇒ 8 + 5 ≥ 2x + x
⇒ 13 ≥ 3x ⇒ 3x ≤ 13
⇒ x ≤ `13/3 = 4 1/3`
x = 1, 2, 3, 4 (x ∈ N)
Solution set = {1, 2, 3, 4}
Concept: Replacement Set and Solution Set
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