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प्रश्न
Solve : 9x - 7 ≤ 5: 28 + 4x ; x ∈ W.
बेरीज
उत्तर
9x – 1 ≤ 28 + 4x
⇒ 9x – 4x – 7 ≤ 28 + 4x – 4x (Subtracting 4x)
⇒ 5x – 7 ≤ 28
⇒ 5x – 7 + 7 ≤ 28 + 7 (Adding 7)
⇒ 5x ≤ 35
⇒ x ≤ 7 (Dividing by 5)
Required answer = {0, 1, 2, 3, 4, 5, 6, 7}
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Replacement Set and Solution Set
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